Final batch adding real histogram values for extension events.

chrome/browser/extensions/api/web_navigation/web_navigation_api.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.
 
 // Implements the Chrome Extensions WebNavigation API.
 
 #include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
 
 #include "base/lazy_instance.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 301 matching lines @@
   bool is_history_state_modification =
       navigation_state_.GetNavigationCommitted(render_frame_host);
 
   // Update the URL as it might have changed.
   navigation_state_.UpdateFrame(render_frame_host, url);
   navigation_state_.SetNavigationCommitted(render_frame_host);
 
   if (!navigation_state_.CanSendEvents(render_frame_host))
     return;
 
+  events::HistogramValue histogram_value = events::UNKNOWN;
   std::string event_name;
   if (is_reference_fragment_navigation) {
+    histogram_value = events::WEB_NAVIGATION_ON_REFERENCE_FRAGMENT_UPDATED;
     event_name = web_navigation::OnReferenceFragmentUpdated::kEventName;
   } else if (is_history_state_modification) {
+    histogram_value = events::WEB_NAVIGATION_ON_HISTORY_STATE_UPDATED;
     event_name = web_navigation::OnHistoryStateUpdated::kEventName;
   } else {
     if (navigation_state_.GetIsServerRedirected(render_frame_host)) {
       transition_type = ui::PageTransitionFromInt(
           transition_type | ui::PAGE_TRANSITION_SERVER_REDIRECT);
     }
+    histogram_value = events::WEB_NAVIGATION_ON_COMMITTED;
     event_name = web_navigation::OnCommitted::kEventName;
   }
-  helpers::DispatchOnCommitted(event_name, web_contents(), render_frame_host,
-                               navigation_state_.GetUrl(render_frame_host),
-                               transition_type);
+  helpers::DispatchOnCommitted(
+      histogram_value, event_name, web_contents(), render_frame_host,
+      navigation_state_.GetUrl(render_frame_host), transition_type);
 }
 
 void WebNavigationTabObserver::DidFailProvisionalLoad(
     content::RenderFrameHost* render_frame_host,
     const GURL& validated_url,
     int error_code,
     const base::string16& error_description,
     bool was_ignored_by_handler) {
   DVLOG(2) << "DidFailProvisionalLoad("
            << "render_frame_host=" << render_frame_host
@@ skipping 274 matching lines @@
   return g_factory.Pointer();
 }
 
 void WebNavigationAPI::OnListenerAdded(const EventListenerInfo& details) {
   web_navigation_event_router_.reset(new WebNavigationEventRouter(
       Profile::FromBrowserContext(browser_context_)));
   EventRouter::Get(browser_context_)->UnregisterObserver(this);
 }
 
 }  // namespace extensions