Export a private webstore API to call into the new inline sign-in flow.

chrome/browser/services/gcm/gcm_profile_service.cc

Index: chrome/browser/services/gcm/gcm_profile_service.cc
diff --git a/chrome/browser/services/gcm/gcm_profile_service.cc b/chrome/browser/services/gcm/gcm_profile_service.cc
index 1f4d884a7ea5817bf052c8cacbd64897cc6758c2..0f35fcac7778fa59157b2ced359f057d1ea25650 100644
--- a/chrome/browser/services/gcm/gcm_profile_service.cc
+++ b/chrome/browser/services/gcm/gcm_profile_service.cc
@@ -20,7 +20,6 @@
 #include "chrome/browser/services/gcm/gcm_client_factory.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager.h"
-#include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_version_info.h"
@@ -449,6 +448,7 @@ void GCMProfileService::Initialize(
                  content::Source<Profile>(profile_));
 
   SigninManagerFactory::GetForProfile(profile_)->AddObserver(this);
+  SigninManagerFactory::GetInstance()->AddObserver(this);
 
   // Get the list of available accounts.
   std::vector<std::string> account_ids;
@@ -506,6 +506,7 @@ void GCMProfileService::Shutdown() {
   }
   app_handlers_.clear();
 
+  SigninManagerFactory::GetInstance()->RemoveObserver(this);
   SigninManagerFactory::GetForProfile(profile_)->RemoveObserver(this);
 }
 
@@ -722,6 +723,14 @@ void GCMProfileService::GoogleSignedOut(const std::string& username) {
   CheckOut();
 }
 
+void GCMProfileService::SigninManagerCreated(SigninManagerBase* manager) {
+  manager->AddObserver(this);
+}
+
+void GCMProfileService::SigninManagerShutdown(SigninManagerBase* manager) {
+  manager->RemoveObserver(this);
+}
+
 void GCMProfileService::EnsureLoaded() {
   SigninManagerBase* manager = SigninManagerFactory::GetForProfile(profile_);
   if (!manager)