Reland r54723. Implement the webNavigation.onCommitted event.

BUG=50943
TEST=ExtensionApiTest.WebNavigationEvents

Review URL: http://codereview.chromium.org/3310025

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@59212 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extensions_service.cc b/chrome/browser/extensions/extensions_service.cc
index 7011ed7..1dff713 100644
--- a/chrome/browser/extensions/extensions_service.cc
+++ b/chrome/browser/extensions/extensions_service.cc
@@ -34,6 +34,7 @@
 #include "chrome/browser/extensions/extension_management_api.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 #include "chrome/browser/extensions/extension_updater.h"
+#include "chrome/browser/extensions/extension_webnavigation_api.h"
 #include "chrome/browser/extensions/external_extension_provider.h"
 #include "chrome/browser/extensions/external_pref_extension_provider.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
@@ -265,6 +266,7 @@
       profile_->GetBookmarkModel());
   ExtensionCookiesEventRouter::GetInstance()->Init();
   ExtensionManagementEventRouter::GetInstance()->Init();
+  ExtensionWebNavigationEventRouter::GetInstance()->Init();
 }
 
 void ExtensionsService::Init() {