Add DataReductionProxy IPC to determine if the Data Reduction Proxy was used.

The current mechanism is to create an instance of DataReductionProxyParams
inside of page_load_histogram, and to then check the proxy server inside of
DocumentState against DataReductionProxyParams. However, the plan is to make
the configuration dynamic, so we can no longer use DataReductionProxyParams.

BUG=452773

Review URL: https://codereview.chromium.org/966443002

Cr-Commit-Position: refs/heads/master@{#318917}

chrome/browser/BUILD.gn

@@ -232,6 +232,7 @@ static_library("browser") {
       "//chrome/installer/util",
       "//components/app_modal",
       "//components/autofill/content/browser",
+      "//components/data_reduction_proxy/content/browser",
       "//components/dom_distiller/content",
       "//components/history/content/browser",
       "//components/keyed_service/content",
@@ -594,7 +595,6 @@ static_library("browser") {
     deps += [
       ":jni_headers",
       "//components/cdm/browser",
-      "//components/data_reduction_proxy/content/browser",
       "//components/enhanced_bookmarks",
       "//components/resources:components_resources",
       "//components/web_contents_delegate_android",

chrome/browser/chrome_content_browser_client.cc

@@ -43,6 +43,8 @@
 #include "chrome/browser/metrics/rappor/sampling.h"
 #include "chrome/browser/nacl_host/nacl_browser_delegate_impl.h"
 #include "chrome/browser/net/chrome_net_log.h"
+#include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings.h"
+#include "chrome/browser/net/spdyproxy/data_reduction_proxy_chrome_settings_factory.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
 #include "chrome/browser/notifications/desktop_notification_service_factory.h"
 #include "chrome/browser/notifications/platform_notification_service_impl.h"
@@ -100,6 +102,7 @@
 #include "components/content_settings/core/browser/host_content_settings_map.h"
 #include "components/content_settings/core/common/content_settings.h"
 #include "components/content_settings/core/common/permission_request_id.h"
+#include "components/data_reduction_proxy/content/browser/data_reduction_proxy_message_filter.h"
 #include "components/dom_distiller/core/url_constants.h"
 #include "components/google/core/browser/google_util.h"
 #include "components/metrics/client_info.h"
@@ -944,6 +947,13 @@ void ChromeContentBrowserClient::RenderProcessWillLaunch(
   if (switches::IsEnableAccountConsistency())
     host->AddFilter(new PrincipalsMessageFilter(id));
 
+  DataReductionProxyChromeSettings* data_reduction_proxy_settings =
+      DataReductionProxyChromeSettingsFactory::GetForBrowserContext(profile);
+  if (data_reduction_proxy_settings) {
+    host->AddFilter(new data_reduction_proxy::DataReductionProxyMessageFilter(
+        data_reduction_proxy_settings));
+  }
+
   host->Send(new ChromeViewMsg_SetIsIncognitoProcess(
       profile->IsOffTheRecord()));
 

chrome/chrome_browser.gypi

@@ -3003,6 +3003,7 @@
             '../third_party/re2/re2.gyp:re2',
             '../cc/cc.gyp:cc',
             '../components/components.gyp:autofill_content_browser',
+            '../components/components.gyp:data_reduction_proxy_content_browser',
             '../components/components.gyp:dom_distiller_content',
             '../components/components.gyp:history_content_browser',
             '../components/components.gyp:keyed_service_content',

chrome/chrome_renderer.gypi

@@ -258,7 +258,7 @@
         '../third_party/re2/re2.gyp:re2',
         '../components/components.gyp:autofill_content_renderer',
         '../components/components.gyp:cdm_renderer',
-        '../components/components.gyp:data_reduction_proxy_core_common',
+        '../components/components.gyp:data_reduction_proxy_content_common',
         '../components/components.gyp:network_hints_renderer',
         '../components/components.gyp:error_page_renderer',
         '../components/components.gyp:startup_metric_utils',

chrome/renderer/BUILD.gn

@@ -37,7 +37,7 @@ static_library("renderer") {
     "//chrome:strings",
     "//components/autofill/content/renderer",
     "//components/cdm/renderer",
-    "//components/data_reduction_proxy/core/common",
+    "//components/data_reduction_proxy/content/common",
     "//components/network_hints/renderer",
     "//components/error_page/renderer",
     "//components/password_manager/content/renderer",

chrome/renderer/DEPS

@@ -7,7 +7,7 @@ include_rules = [
   "+components/cdm/renderer",
   "+components/content_settings/core/common",
   "+components/crx_file",
-  "+components/data_reduction_proxy/core/common",
+  "+components/data_reduction_proxy/content/common",
   "+components/dom_distiller/core",
   "+components/nacl/common",
   "+components/nacl/renderer",

chrome/renderer/page_load_histograms.cc

@@ -18,7 +18,7 @@
 #include "base/time/time.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/renderer/chrome_content_renderer_client.h"
-#include "components/data_reduction_proxy/core/common/data_reduction_proxy_headers.h"
+#include "components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h"
 #include "content/public/common/content_constants.h"
 #include "content/public/renderer/document_state.h"
 #include "content/public/renderer/render_thread.h"
@@ -724,11 +724,7 @@ void DumpDeprecatedHistograms(const WebPerformance& performance,
 }  // namespace
 
 PageLoadHistograms::PageLoadHistograms(content::RenderView* render_view)
-    : content::RenderViewObserver(render_view),
-      data_reduction_proxy_params_(
-          data_reduction_proxy::DataReductionProxyParams::kAllowed |
-          data_reduction_proxy::DataReductionProxyParams::kFallbackAllowed |
-          data_reduction_proxy::DataReductionProxyParams::kAlternativeAllowed) {
+    : content::RenderViewObserver(render_view) {
 }
 
 void PageLoadHistograms::Dump(WebFrame* frame) {
@@ -750,9 +746,12 @@ void PageLoadHistograms::Dump(WebFrame* frame) {
   DocumentState* document_state =
       DocumentState::FromDataSource(frame->dataSource());
 
-  bool data_reduction_proxy_was_used =
-      data_reduction_proxy_params_.IsDataReductionProxy(
-          document_state->proxy_server(), NULL);
+  bool data_reduction_proxy_was_used = false;
+  if (!document_state->proxy_server().IsEmpty()) {
+    Send(new DataReductionProxyViewHostMsg_IsDataReductionProxy(
+        document_state->proxy_server(), &data_reduction_proxy_was_used));
+  }
+
   bool came_from_websearch =
       IsFromGoogleSearchResult(frame->document().url(),
                                GURL(frame->document().referrer()));

chrome/renderer/page_load_histograms.h

@@ -6,7 +6,6 @@
 #define CHROME_RENDERER_PAGE_LOAD_HISTOGRAMS_H_
 
 #include "base/basictypes.h"
-#include "components/data_reduction_proxy/core/common/data_reduction_proxy_params.h"
 #include "content/public/renderer/render_view_observer.h"
 
 namespace content {
@@ -46,8 +45,6 @@ class PageLoadHistograms : public content::RenderViewObserver {
   void LogPageLoadTime(const content::DocumentState* load_times,
                        const blink::WebDataSource* ds) const;
 
-  data_reduction_proxy::DataReductionProxyParams data_reduction_proxy_params_;
-
   DISALLOW_COPY_AND_ASSIGN(PageLoadHistograms);
 };
 

components/BUILD.gn

@@ -242,6 +242,7 @@ test("components_unittests") {
     "//components/content_settings/core/browser:unit_tests",
     "//components/content_settings/core/common:unit_tests",
     "//components/crx_file:unit_tests",
+    "//components/data_reduction_proxy/content/browser:unit_tests",
     "//components/data_reduction_proxy/core/browser:unit_tests",
     "//components/data_reduction_proxy/core/common:unit_tests",
     "//components/device_event_log:unit_tests",
@@ -269,10 +270,6 @@ test("components_unittests") {
   ]
   data_deps = [ ":components_tests_pak" ]
 
-  if (is_android) {
-    deps += [ "//components/data_reduction_proxy/content/browser:unit_tests" ]
-  }
-
   # TODO(GYP) need this target.
   #'breakpad/app/crash_keys_win_unittest.cc',
 

components/components_tests.gyp

@@ -490,6 +490,7 @@
             ['OS != "ios"', {
               'sources': [
                 'autofill/content/renderer/renderer_save_password_progress_logger_unittest.cc',
+                'data_reduction_proxy/content/browser/data_reduction_proxy_message_filter_unittest.cc',
                 'dom_distiller/content/dom_distiller_viewer_source_unittest.cc',
                 'dom_distiller/content/web_contents_main_frame_observer_unittest.cc',
                 'error_page/renderer/net_error_helper_core_unittest.cc',
@@ -505,6 +506,7 @@
                 'components.gyp:autofill_content_browser',
                 'components.gyp:autofill_content_renderer',
                 'components.gyp:autofill_content_test_support',
+                'components.gyp:data_reduction_proxy_content_browser',
                 'components.gyp:dom_distiller_content',
                 'components.gyp:error_page_renderer',
                 'components.gyp:history_content_browser',

components/data_reduction_proxy.gypi

@@ -32,6 +32,39 @@
         'data_reduction_proxy/content/browser/data_reduction_proxy_debug_ui_manager.h',
       ],
     },
+    {
+      # GN version: //components/data_reduction_proxy/content/common
+      'target_name': 'data_reduction_proxy_content_common',
+      'type': 'static_library',
+      'dependencies': [
+        '../content/content.gyp:content_common',
+        '../ipc/ipc.gyp:ipc',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'data_reduction_proxy/content/common/data_reduction_proxy_messages.cc',
+        'data_reduction_proxy/content/common/data_reduction_proxy_messages.h',
+      ],
+    },
+    {
+      # GN version: //components/data_reduction_proxy/content/browser
+      'target_name': 'data_reduction_proxy_content_browser',
+      'type': 'static_library',
+      'dependencies': [
+        '../content/content.gyp:content_common',
+        '../ipc/ipc.gyp:ipc',
+        'data_reduction_proxy_content_common',
+      ],
+      'include_dirs': [
+        '..',
+      ],
+      'sources': [
+        'data_reduction_proxy/content/browser/data_reduction_proxy_message_filter.cc',
+        'data_reduction_proxy/content/browser/data_reduction_proxy_message_filter.h',
+      ],
+    },
     {
       # GN version: //components/data_reduction_proxy/core/browser
       'target_name': 'data_reduction_proxy_core_browser',
@@ -181,6 +214,5 @@
         },
       ],
     },
-
   ],
 }

components/data_reduction_proxy/OWNERS

@@ -2,3 +2,17 @@ bengr@chromium.org
 bolian@chromium.org
 marq@chromium.org
 sclittle@chromium.org
+
+# Changes to IPC messages require a security review to avoid introducing
+# new sandbox escapes.
+per-file *_messages.*=set noparent
+per-file *_messages.*=dcheng@chromium.org
+per-file *_messages.*=inferno@chromium.org
+per-file *_messages.*=jln@chromium.org
+per-file *_messages.*=jschuh@chromium.org
+per-file *_messages.*=kenrb@chromium.org
+per-file *_messages.*=mkwst@chromium.org
+per-file *_messages.*=nasko@chromium.org
+per-file *_messages.*=palmer@chromium.org
+per-file *_messages.*=tsepez@chromium.org
+per-file *_messages.*=wfh@chromium.org

components/data_reduction_proxy/content/browser/BUILD.gn

@@ -4,40 +4,64 @@
 
 static_library("browser") {
   sources = [
-    "content_data_reduction_proxy_debug_ui_service.cc",
-    "content_data_reduction_proxy_debug_ui_service.h",
-    "data_reduction_proxy_debug_blocking_page.cc",
-    "data_reduction_proxy_debug_blocking_page.h",
-    "data_reduction_proxy_debug_resource_throttle.cc",
-    "data_reduction_proxy_debug_resource_throttle.h",
-    "data_reduction_proxy_debug_ui_manager.cc",
-    "data_reduction_proxy_debug_ui_manager.h",
+    "data_reduction_proxy_message_filter.cc",
+    "data_reduction_proxy_message_filter.h",
   ]
 
   deps = [
     "//base",
-    "//components/resources",
-    "//components/strings",
+    "//components/data_reduction_proxy/content/common",
     "//content/public/browser",
-    "//skia",
-    "//ui/base",
+    "//ipc",
+    "//net",
   ]
+
+  if (is_android) {
+    sources += [
+      "content_data_reduction_proxy_debug_ui_service.cc",
+      "content_data_reduction_proxy_debug_ui_service.h",
+      "data_reduction_proxy_debug_blocking_page.cc",
+      "data_reduction_proxy_debug_blocking_page.h",
+      "data_reduction_proxy_debug_resource_throttle.cc",
+      "data_reduction_proxy_debug_resource_throttle.h",
+      "data_reduction_proxy_debug_ui_manager.cc",
+      "data_reduction_proxy_debug_ui_manager.h",
+    ]
+
+    deps += [
+      "//components/resources",
+      "//components/strings",
+      "//skia",
+      "//ui/base",
+    ]
+  }
 }
 
-if (is_android) {
-  source_set("unit_tests") {
-    testonly = true
-    sources = [
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "data_reduction_proxy_message_filter_unittest.cc",
+  ]
+
+  deps = [
+    ":browser",
+    "//base",
+    "//components/data_reduction_proxy/core/browser:test_support",
+    "//components/data_reduction_proxy/core/common:test_support",
+    "//net",
+    "//testing/gtest",
+    "//testing/gmock",
+  ]
+
+  if (is_android) {
+    sources += [
       "data_reduction_proxy_debug_blocking_page_unittest.cc",
       "data_reduction_proxy_debug_resource_throttle_unittest.cc",
       "data_reduction_proxy_debug_ui_manager_unittest.cc",
     ]
 
-    deps = [
-      ":browser",
+    deps += [
       "//skia",
-      "//testing/gtest",
-      "//testing/gmock",
       "//third_party/mojo/src/mojo/public/cpp/bindings",
     ]
   }

components/data_reduction_proxy/content/browser/DEPS

+include_rules = [
+  "+ipc",
+  "+net",
+]
\ No newline at end of file

components/data_reduction_proxy/content/browser/data_reduction_proxy_message_filter.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/data_reduction_proxy/content/browser/data_reduction_proxy_message_filter.h"
+
+#include "components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h"
+#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_config.h"
+#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h"
+#include "content/public/browser/browser_thread.h"
+#include "ipc/ipc_message_macros.h"
+#include "net/base/host_port_pair.h"
+
+namespace data_reduction_proxy {
+
+DataReductionProxyMessageFilter::DataReductionProxyMessageFilter(
+    DataReductionProxySettings* settings)
+    : BrowserMessageFilter(DataReductionProxyStart),
+      config_(nullptr) {
+  DCHECK(settings);
+  config_ = settings->Config();
+}
+
+DataReductionProxyMessageFilter::~DataReductionProxyMessageFilter() {
+}
+
+bool DataReductionProxyMessageFilter::OnMessageReceived(
+    const IPC::Message& message) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(DataReductionProxyMessageFilter, message)
+    IPC_MESSAGE_HANDLER(DataReductionProxyViewHostMsg_IsDataReductionProxy,
+                        OnIsDataReductionProxy)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void DataReductionProxyMessageFilter::OverrideThreadForMessage(
+    const IPC::Message& message, content::BrowserThread::ID* thread) {
+  if (message.type() ==
+          DataReductionProxyViewHostMsg_IsDataReductionProxy::ID) {
+      *thread = content::BrowserThread::IO;
+  }
+}
+
+void DataReductionProxyMessageFilter::OnIsDataReductionProxy(
+    const net::HostPortPair& proxy_server, bool* response) {
+  if (config_)
+    *response = config_->IsDataReductionProxy(proxy_server, nullptr);
+  else
+    *response = false;
+}
+
+}  // namespace data_reduction_proxy

components/data_reduction_proxy/content/browser/data_reduction_proxy_message_filter.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_DATA_REDUCTION_PROXY_CONTENT_BROWSER_DATA_REDUCTION_PROXY_MESSAGE_FILTER_H_
+#define COMPONENTS_DATA_REDUCTION_PROXY_CONTENT_BROWSER_DATA_REDUCTION_PROXY_MESSAGE_FILTER_H_
+
+#include "base/macros.h"
+#include "content/public/browser/browser_message_filter.h"
+
+namespace net {
+class HostPortPair;
+}
+
+namespace data_reduction_proxy {
+
+class DataReductionProxyConfig;
+class DataReductionProxySettings;
+
+// An IPC listener to handle DataReductionProxy IPC messages from the renderer.
+class DataReductionProxyMessageFilter
+    : public content::BrowserMessageFilter {
+ public:
+  DataReductionProxyMessageFilter(DataReductionProxySettings* settings);
+
+  // Sets |response| to true if the |proxy_server| corresponds to a Data
+  // Reduction Proxy.
+  void OnIsDataReductionProxy(const net::HostPortPair& proxy_server,
+                              bool* response);
+
+ private:
+  ~DataReductionProxyMessageFilter() override;
+
+  // BrowserMessageFilter implementation.
+  bool OnMessageReceived(const IPC::Message& message) override;
+  void OverrideThreadForMessage(const IPC::Message& message,
+                                content::BrowserThread::ID* thread) override;
+
+  // Must outlive |this|.
+  DataReductionProxyConfig* config_;
+
+  DISALLOW_COPY_AND_ASSIGN(DataReductionProxyMessageFilter);
+};
+
+}  // namespace data_reduction_proxy
+
+#endif  // COMPONENTS_DATA_REDUCTION_PROXY_CONTENT_BROWSER_DATA_REDUCTION_PROXY_MESSAGE_FILTER_H_

components/data_reduction_proxy/content/browser/data_reduction_proxy_message_filter_unittest.cc

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "components/data_reduction_proxy/content/browser/data_reduction_proxy_message_filter.h"
+
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.h"
+#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.h"
+#include "components/data_reduction_proxy/core/common/data_reduction_proxy_params_test_utils.h"
+#include "net/base/host_port_pair.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace data_reduction_proxy {
+
+class DataReductionProxyMessageFilterTest : public testing::Test {
+ public:
+  void SetUp() override {
+    test_context_ =
+        DataReductionProxyTestContext::Builder()
+            .WithParamsFlags(DataReductionProxyParams::kAllowed)
+            .WithParamsDefinitions(TestDataReductionProxyParams::HAS_EVERYTHING)
+            .WithMockConfig()
+            .Build();
+    message_filter_ = new DataReductionProxyMessageFilter(
+        test_context_->settings());
+  }
+
+ protected:
+  DataReductionProxyMessageFilter* message_filter() const {
+    return message_filter_.get();
+  }
+
+  MockDataReductionProxyConfig* config() const {
+    return test_context_->mock_config();
+  }
+
+ private:
+  scoped_ptr<DataReductionProxyTestContext> test_context_;
+  scoped_refptr<DataReductionProxyMessageFilter> message_filter_;
+};
+
+TEST_F(DataReductionProxyMessageFilterTest, TestOnIsDataReductionProxy) {
+  net::HostPortPair proxy_server =
+      net::HostPortPair::FromString("www.google.com:443");
+  bool is_data_reduction_proxy = false;
+  EXPECT_CALL(*config(), IsDataReductionProxy(testing::_, nullptr))
+      .Times(1)
+      .WillOnce(testing::Return(true));
+  message_filter()->OnIsDataReductionProxy(proxy_server,
+                                           &is_data_reduction_proxy);
+  EXPECT_TRUE(is_data_reduction_proxy);
+
+  EXPECT_CALL(*config(), IsDataReductionProxy(testing::_, nullptr))
+      .Times(1)
+      .WillOnce(testing::Return(false));
+  message_filter()->OnIsDataReductionProxy(proxy_server,
+                                           &is_data_reduction_proxy);
+  EXPECT_FALSE(is_data_reduction_proxy);
+}
+
+}  // namespace data_reduction_proxy

components/data_reduction_proxy/content/common/BUILD.gn

+# Copyright 2015 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+static_library("common") {
+  sources = [
+    "data_reduction_proxy_messages.cc",
+    "data_reduction_proxy_messages.h",
+  ]
+
+  deps = [
+    "//content/public/common",
+    "//ipc",
+    "//net",
+  ]
+}

components/data_reduction_proxy/content/common/DEPS

+include_rules = [
+  "+content/public/common",
+  "+ipc",
+]

components/data_reduction_proxy/content/common/data_reduction_proxy_messages.cc

+// Copyright (c) 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Get basic type definitions.
+#define IPC_MESSAGE_IMPL
+#include "components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h"
+
+// Generate constructors.
+#include "ipc/struct_constructor_macros.h"
+#include "components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h"
+
+// Generate destructors.
+#include "ipc/struct_destructor_macros.h"
+#include "components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h"
+
+// Generate param traits write methods.
+#include "ipc/param_traits_write_macros.h"
+namespace IPC {
+#include "components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h"
+}  // namespace IPC
+
+// Generate param traits read methods.
+#include "ipc/param_traits_read_macros.h"
+namespace IPC {
+#include "components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h"
+}  // namespace IPC
+
+// Generate param traits log methods.
+#include "ipc/param_traits_log_macros.h"
+namespace IPC {
+#include "components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h"
+}  // namespace IPC

components/data_reduction_proxy/content/common/data_reduction_proxy_messages.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Multiply-included file, no traditional include guard.
+#include "content/public/common/common_param_traits.h"
+#include "ipc/ipc_message_macros.h"
+#include "net/base/host_port_pair.h"
+
+#define IPC_MESSAGE_START DataReductionProxyStart
+
+IPC_SYNC_MESSAGE_CONTROL1_1(
+    DataReductionProxyViewHostMsg_IsDataReductionProxy,
+    net::HostPortPair /* proxy server */,
+    bool /* true iff the proxy server is a Data Reduction Proxy */)

components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h

@@ -169,6 +169,12 @@ class DataReductionProxySettings {
     return data_reduction_proxy_service_.get();
   }
 
+  // Returns the |DataReductionProxyConfig| being used. May be null if
+  // InitDataReductionProxySettings has not been called.
+  DataReductionProxyConfig* Config() const {
+    return config_;
+  }
+
   // Permits changing the underlying |DataReductionProxyConfig| without running
   // the initialization loop.
   void ResetConfigForTest(DataReductionProxyConfig* config) {
@@ -176,12 +182,6 @@ class DataReductionProxySettings {
   }
 
  protected:
-  // Returns the |DataReductionProxyConfig| being used. May be null if
-  // InitDataReductionProxySettings has not been called.
-  DataReductionProxyConfig* Config() const {
-    return config_;
-  }
-
   void InitPrefMembers();
 
   void UpdateConfigValues();

content/public/renderer/document_state.h

@@ -161,8 +161,8 @@ class CONTENT_EXPORT DocumentState
     was_fetched_via_proxy_ = value;
   }
 
-  net::HostPortPair proxy_server() const { return proxy_server_; }
-  void set_proxy_server(net::HostPortPair proxy_server) {
+  const net::HostPortPair& proxy_server() const { return proxy_server_; }
+  void set_proxy_server(const net::HostPortPair& proxy_server) {
     proxy_server_ = proxy_server;
   }
 

ipc/ipc_message_start.h

@@ -118,6 +118,7 @@ enum IPCMessageStart {
   // Note: CastCryptoMsgStart reserved for Chromecast internal code.
   // Contact gunsch@ before changing/removing.
   CastCryptoMsgStart,
+  DataReductionProxyStart,
   LastIPCMsgStart  // Must come last.
 };