Properly handle disabling sync via the google dashboard.

chrome/browser/signin/signin_manager_fake.cc

Index: chrome/browser/signin/signin_manager_fake.cc
diff --git a/chrome/browser/signin/signin_manager_fake.cc b/chrome/browser/signin/signin_manager_fake.cc
index 6b377c15431a515d4e4df4be372cb9d5faeebb2c..b3c0ab13534cbbc25f8c3e59a53ea56d0ff21e2f 100644
--- a/chrome/browser/signin/signin_manager_fake.cc
+++ b/chrome/browser/signin/signin_manager_fake.cc
@@ -46,6 +46,8 @@ void FakeSigninManager::StartSignInWithOAuth(const std::string& username,
 }
 
 void FakeSigninManager::SignOut() {
+  if (IsSignoutProhibited())
+    return;
   authenticated_username_.clear();
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_GOOGLE_SIGNED_OUT,
@@ -53,6 +55,12 @@ void FakeSigninManager::SignOut() {
       content::NotificationService::NoDetails());
 }
 
+void FakeSigninManager::ForceSignOut() {
+  // Allow signing out now.
+  prohibit_signout_ = false;
+  SignOut();
+}
+
 bool FakeSigninManager::AuthInProgress() const {
   return auth_in_progress_;
 }