Add a referrer class to be used in the browser process whenever passing around referrers

BUG=10502
TEST=content_unittest:ReferrerTest.*


Review URL: http://codereview.chromium.org/8635017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@111566 0039d316-1c4b-4281-b951-d872f2087c98

content/common/referrer_unittest.cc

+// Copyright (c) 2011 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 "testing/gtest/include/gtest/gtest.h"
+
+#include "content/public/common/referrer.h"
+
+namespace {
+
+const char* kTestURL = "http://google.com/";
+
+// Check that copying Referrer objects works.
+TEST(ReferrerTest, Copy) {
+  content::Referrer r1(GURL(kTestURL), WebKit::WebReferrerPolicyAlways);
+  content::Referrer r2;
+
+  r2 = r1;
+  EXPECT_EQ(GURL(kTestURL), r2.url);
+  EXPECT_EQ(WebKit::WebReferrerPolicyAlways, r2.policy);
+}
+
+}  // namespace

content/content_common.gypi

@@ -51,6 +51,7 @@
     'public/common/page_zoom.h',
     'public/common/pepper_plugin_info.cc',
     'public/common/pepper_plugin_info.h',
+    'public/common/referrer.h',
     'public/common/renderer_preferences.cc',
     'public/common/renderer_preferences.h',
     'public/common/resource_dispatcher_delegate.h',

content/content_tests.gypi

@@ -228,6 +228,7 @@
         'common/hi_res_timer_manager_unittest.cc',
         'common/net/url_fetcher_impl_unittest.cc',
         'common/page_zoom_unittest.cc',
+        'common/referrer_unittest.cc',
         'common/resource_dispatcher_unittest.cc',
         'gpu/gpu_info_collector_unittest.cc',
         'gpu/gpu_info_collector_unittest_win.cc',

content/public/common/referrer.h

+// Copyright (c) 2011 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 CONTENT_PUBLIC_COMMON_REFERRER_H_
+#define CONTENT_PUBLIC_COMMON_REFERRER_H_
+#pragma once
+
+#include "content/common/content_export.h"
+#include "googleurl/src/gurl.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebReferrerPolicy.h"
+
+namespace content {
+
+// This struct holds a referrer URL, as well as the referrer policy to be
+// applied to this URL. When passing around referrers that will eventually end
+// up being used for URL requests, always use this struct.
+struct CONTENT_EXPORT Referrer {
+  Referrer(const GURL& url, WebKit::WebReferrerPolicy policy)
+      : url(url),
+        policy(policy) {
+  }
+  Referrer()
+      : policy(WebKit::WebReferrerPolicyDefault) {
+  }
+
+  GURL url;
+  WebKit::WebReferrerPolicy policy;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_COMMON_REFERRER_H_