Network traffic annotation added to browser unittests.

Network traffic annotation is added to network requests of:
chrome/browser/net/proxy_browsertest.cc
chrome/browser/predictors/resource_prefetch_predictor_unittest.cc
chrome/browser/prerender/prerender_resource_throttle_unittest.cc
chrome/browser/ui/views/ssl_client_certificate_selector_browsertest.cc

BUG=656607

Review-Url: https://codereview.chromium.org/2895173002
Cr-Commit-Position: refs/heads/master@{#473740}

chrome/browser/net/proxy_browsertest.cc

@@ -30,6 +30,7 @@
 #include "net/test/embedded_test_server/embedded_test_server_connection_listener.h"
 #include "net/test/spawned_test_server/spawned_test_server.h"
 #include "net/test/test_data_directory.h"
+#include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
 #include "url/gurl.h"
@@ -363,7 +364,8 @@ IN_PROC_BROWSER_TEST_F(HangingPacRequestProxyScriptBrowserTest, Shutdown) {
   // best to be safe.
   HangingURLFetcherDelegate hanging_request_delegate;
   std::unique_ptr<net::URLFetcher> hanging_fetcher = net::URLFetcher::Create(
-      GURL("http://blah/"), net::URLFetcher::GET, &hanging_request_delegate);
+      GURL("http://blah/"), net::URLFetcher::GET, &hanging_request_delegate,
+      TRAFFIC_ANNOTATION_FOR_TESTS);
   hanging_fetcher->SetRequestContext(browser()->profile()->GetRequestContext());
   hanging_fetcher->Start();
 

chrome/browser/predictors/resource_prefetch_predictor_unittest.cc

@@ -23,6 +23,7 @@
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "net/http/http_response_headers.h"
+#include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_job.h"
 #include "net/url_request/url_request_test_util.h"
@@ -213,7 +214,8 @@ class ResourcePrefetchPredictorTest : public testing::Test {
       bool is_main_frame) {
     std::unique_ptr<net::URLRequest> request =
         url_request_context_.CreateRequest(url, priority,
-                                           &url_request_delegate_);
+                                           &url_request_delegate_,
+                                           TRAFFIC_ANNOTATION_FOR_TESTS);
     request->set_first_party_for_cookies(url);
     content::ResourceRequestInfo::AllocateForTesting(
         request.get(), resource_type, nullptr, -1, -1, -1, is_main_frame, false,

chrome/browser/prerender/prerender_resource_throttle_unittest.cc

@@ -248,7 +248,7 @@ TEST_F(PrerenderResourceThrottleTest, RedirectMainFrame) {
   DeferredRedirectDelegate delegate;
   std::unique_ptr<net::URLRequest> request(url_request_context.CreateRequest(
       net::URLRequestMockHTTPJob::GetMockUrl("prerender/image-deferred.png"),
-      net::DEFAULT_PRIORITY, &delegate));
+      net::DEFAULT_PRIORITY, &delegate, TRAFFIC_ANNOTATION_FOR_TESTS));
   content::ResourceRequestInfo::AllocateForTesting(
       request.get(), content::RESOURCE_TYPE_MAIN_FRAME, NULL, kDefaultChildId,
       kDefaultRouteId, MSG_ROUTING_NONE,
@@ -284,7 +284,7 @@ TEST_F(PrerenderResourceThrottleTest, RedirectSyncXHR) {
   DeferredRedirectDelegate delegate;
   std::unique_ptr<net::URLRequest> request(url_request_context.CreateRequest(
       net::URLRequestMockHTTPJob::GetMockUrl("prerender/image-deferred.png"),
-      net::DEFAULT_PRIORITY, &delegate));
+      net::DEFAULT_PRIORITY, &delegate, TRAFFIC_ANNOTATION_FOR_TESTS));
   content::ResourceRequestInfo::AllocateForTesting(
       request.get(), content::RESOURCE_TYPE_XHR, NULL, kDefaultChildId,
       kDefaultRouteId, MSG_ROUTING_NONE,

chrome/browser/ui/views/ssl_client_certificate_selector_browsertest.cc

@@ -24,6 +24,7 @@
 #include "net/ssl/ssl_cert_request_info.h"
 #include "net/test/cert_test_util.h"
 #include "net/test/test_data_directory.h"
+#include "net/traffic_annotation/network_traffic_annotation_test_helper.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
@@ -133,7 +134,8 @@ class SSLClientCertificateSelectorTest : public InProcessBrowserTest {
   std::unique_ptr<net::URLRequest> MakeURLRequest(
       net::URLRequestContextGetter* context_getter) {
     return context_getter->GetURLRequestContext()->CreateRequest(
-        GURL("https://example"), net::DEFAULT_PRIORITY, NULL);
+        GURL("https://example"), net::DEFAULT_PRIORITY, NULL,
+        TRAFFIC_ANNOTATION_FOR_TESTS);
   }
 
   base::WaitableEvent io_loop_finished_event_;