Add browser test for NavigationMetricsRecorder

chrome/browser/tab_contents/navigation_metrics_recorder.cc

 // Copyright (c) 2012 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 "chrome/browser/tab_contents/navigation_metrics_recorder.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "build/build_config.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/tab_contents/origins_seen_service_factory.h"
 #include "components/navigation_metrics/navigation_metrics.h"
 #include "components/navigation_metrics/origins_seen_service.h"
+#include "components/rappor/rappor_service.h"
 #include "components/rappor/rappor_utils.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/common/frame_navigate_params.h"
 #include "url/gurl.h"
 #include "url/origin.h"
 
 #if defined(OS_WIN)
 #include "base/win/windows_version.h"
 #endif
 
 DEFINE_WEB_CONTENTS_USER_DATA_KEY(NavigationMetricsRecorder);
 
 NavigationMetricsRecorder::NavigationMetricsRecorder(
     content::WebContents* web_contents)
-    : content::WebContentsObserver(web_contents) {
+    : content::WebContentsObserver(web_contents),
+      rappor_service_(g_browser_process->rappor_service()) {}
+
+NavigationMetricsRecorder::~NavigationMetricsRecorder() {
 }
 
-NavigationMetricsRecorder::~NavigationMetricsRecorder() {
+void NavigationMetricsRecorder::set_rappor_service_for_testing(
+    rappor::RapporService* service) {
+  rappor_service_ = service;
 }
 
 void NavigationMetricsRecorder::DidNavigateMainFrame(
       const content::LoadCommittedDetails& details,
       const content::FrameNavigateParams& params) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   content::BrowserContext* context = web_contents()->GetBrowserContext();
   navigation_metrics::OriginsSeenService* service =
       OriginsSeenServiceFactory::GetForBrowserContext(context);
   const url::Origin origin(details.entry->GetVirtualURL());
   bool have_already_seen_origin = service->Insert(origin);
 
   navigation_metrics::RecordMainFrameNavigation(
       details.entry->GetVirtualURL(), details.is_in_page,
       context->IsOffTheRecord(), have_already_seen_origin);
 
   // Record the domain and registry of the URL that resulted in a navigation to
   // a |data:| URL, either by redirects or user clicking a link.
   if (details.entry->GetVirtualURL().SchemeIs(url::kDataScheme) &&
       !ui::PageTransitionCoreTypeIs(params.transition,
                                     ui::PAGE_TRANSITION_TYPED) &&
       !details.previous_url.is_empty()) {
-    rappor::SampleDomainAndRegistryFromGURL(g_browser_process->rappor_service(),
-                                            "Navigation.Scheme.Data",
-                                            details.previous_url);
+    rappor::SampleDomainAndRegistryFromGURL(
+        rappor_service_, "Navigation.Scheme.Data", details.previous_url);
   }
 }