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

chrome/browser/invalidation/profile_invalidation_auth_provider.h

Index: chrome/browser/invalidation/profile_invalidation_auth_provider.h
diff --git a/chrome/browser/invalidation/profile_invalidation_auth_provider.h b/chrome/browser/invalidation/profile_invalidation_auth_provider.h
index 7c8c71346d04886f197d37208db1847b191eda48..9cf303446120e3dce21499a040aefda6c6a436c3 100644
--- a/chrome/browser/invalidation/profile_invalidation_auth_provider.h
+++ b/chrome/browser/invalidation/profile_invalidation_auth_provider.h
@@ -8,6 +8,7 @@
 #include "base/macros.h"
 #include "chrome/browser/invalidation/invalidation_auth_provider.h"
 #include "chrome/browser/signin/signin_manager_base.h"
+#include "chrome/browser/signin/signin_manager_factory.h"
 
 class LoginUIService;
 class ProfileOAuth2TokenService;
@@ -17,7 +18,8 @@ namespace invalidation {
 // An authentication provider implementation that's backed by
 // ProfileOAuth2TokenService and SigninManager.
 class ProfileInvalidationAuthProvider : public InvalidationAuthProvider,
-                                        public SigninManagerBase::Observer {
+                                        public SigninManagerBase::Observer,
+                                        public SigninManagerFactory::Observer {
  public:
   ProfileInvalidationAuthProvider(SigninManagerBase* signin_manager,
                                   ProfileOAuth2TokenService* token_service,
@@ -32,8 +34,11 @@ class ProfileInvalidationAuthProvider : public InvalidationAuthProvider,
   // SigninManagerBase::Observer:
   virtual void GoogleSignedOut(const std::string& username) OVERRIDE;
 
+  // SigninManagerFactory::Observer:
+  virtual void SigninManagerShutdown(SigninManagerBase* manager) OVERRIDE;
+
  private:
-  SigninManagerBase* const signin_manager_;
+  SigninManagerBase* signin_manager_;
   ProfileOAuth2TokenService* const token_service_;
   LoginUIService* const login_ui_service_;