Add chrome.webstore API methods to allow sites to see progress of installation

chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc

Index: chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc
diff --git a/chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc b/chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc
index cb1429226311fd086e9d770817868294912ad6b9..89a389bff56b07562b6781dbf416b0c52631025f 100644
--- a/chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc
+++ b/chrome/browser/profiles/chrome_browser_main_extra_parts_profiles.cc
@@ -100,6 +100,7 @@
 #include "chrome/browser/extensions/api/web_navigation/web_navigation_api.h"
 #include "chrome/browser/extensions/api/web_request/web_request_api.h"
 #include "chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_api.h"
+#include "chrome/browser/extensions/api/webstore/webstore_api.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/extensions/extension_toolbar_model_factory.h"
 #include "chrome/browser/extensions/extension_web_ui_override_registrar.h"
@@ -324,6 +325,7 @@ EnsureBrowserContextKeyedServiceFactoriesBuilt() {
   extensions::WebNavigationAPI::GetFactoryInstance();
   extensions::WebRequestAPI::GetFactoryInstance();
   extensions::WebrtcAudioPrivateEventService::GetFactoryInstance();
+  extensions::WebstoreAPI::GetFactoryInstance();
   ExtensionToolbarModelFactory::GetInstance();
 #endif  // defined(ENABLE_EXTENSIONS)
   FaviconServiceFactory::GetInstance();