Unregister with push service and SW database when permission is lost.

chrome/browser/services/gcm/push_messaging_service_impl.h

Index: chrome/browser/services/gcm/push_messaging_service_impl.h
diff --git a/chrome/browser/services/gcm/push_messaging_service_impl.h b/chrome/browser/services/gcm/push_messaging_service_impl.h
index 29c03b899b7421923248f83cf776b76af8278f50..edc4548424815c0888ba14c7a8b03e2002e9806c 100644
--- a/chrome/browser/services/gcm/push_messaging_service_impl.h
+++ b/chrome/browser/services/gcm/push_messaging_service_impl.h
@@ -7,6 +7,7 @@
 
 #include "base/compiler_specific.h"
 #include "base/memory/weak_ptr.h"
+#include "components/content_settings/core/browser/content_settings_observer.h"
 #include "components/gcm_driver/gcm_app_handler.h"
 #include "components/gcm_driver/gcm_client.h"
 #include "content/public/browser/push_messaging_service.h"
@@ -25,7 +26,8 @@ class GCMProfileService;
 class PushMessagingApplicationId;
 
 class PushMessagingServiceImpl : public content::PushMessagingService,
-                                 public GCMAppHandler {
+                                 public GCMAppHandler,
+                                 public content_settings::Observer {
  public:
   // Register profile-specific prefs for GCM.
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
@@ -73,6 +75,12 @@ class PushMessagingServiceImpl : public content::PushMessagingService,
       const GURL& requesting_origin,
       const GURL& embedding_origin) override;
 
+  // content_settings::Observer implementation.
+  void OnContentSettingChanged(const ContentSettingsPattern& primary_pattern,
+                               const ContentSettingsPattern& secondary_pattern,
+                               ContentSettingsType content_type,
+                               std::string resource_identifier) override;
+
   void SetProfileForTesting(Profile* profile);
 
  private: