Clear GCM data when the user clears cookies and other site data

components/gcm_driver/gcm_driver_desktop.cc

Index: components/gcm_driver/gcm_driver_desktop.cc
diff --git a/components/gcm_driver/gcm_driver_desktop.cc b/components/gcm_driver/gcm_driver_desktop.cc
index 672296656784a79d914aaf97f3f695f6e3d9070f..17ca12b2c0bc6c9fc48f48ead99972b6d4a659f8 100644
--- a/components/gcm_driver/gcm_driver_desktop.cc
+++ b/components/gcm_driver/gcm_driver_desktop.cc
@@ -369,13 +369,17 @@ void GCMDriverDesktop::OnSignedIn() {
   EnsureStarted();
 }
 
+void GCMDriverDesktop::OnSignedOut() {
+  signed_in_ = false;
+  Purge();
+}
+
 void GCMDriverDesktop::Purge() {
   DCHECK(ui_thread_->RunsTasksOnCurrentThread());
 
   // We still proceed with the check-out logic even if the check-in is not
   // initiated in the current session. This will make sure that all the
   // persisted data written previously will get purged.
-  signed_in_ = false;
   RemoveCachedData();

[fgorski, 2014/09/12 20:15:53]

this causes a wipe of Device ID, right?

Please look into.

[jianli, 2014/09/12 22:13:10]

Removed the confusing comment here. Also updated OnSignedOut.

 
   io_thread_->PostTask(FROM_HERE,