Plumb invalidations from Tango to the extensions code for the Push Messaging API.

chrome/browser/extensions/api/push_messaging/push_messaging_api.h

Index: chrome/browser/extensions/api/push_messaging/push_messaging_api.h
diff --git a/chrome/browser/extensions/api/push_messaging/push_messaging_api.h b/chrome/browser/extensions/api/push_messaging/push_messaging_api.h
index 5d8e95cc92354a4aad3fbf48def392ed1988d9ac..d5a976b935d2757a632931b97295618db4aeac61 100644
--- a/chrome/browser/extensions/api/push_messaging/push_messaging_api.h
+++ b/chrome/browser/extensions/api/push_messaging/push_messaging_api.h
@@ -6,22 +6,33 @@
 #define CHROME_BROWSER_EXTENSIONS_API_PUSH_MESSAGING_PUSH_MESSAGING_API_H__
 
 #include <string>
+
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
-#include "chrome/browser/extensions/api/push_messaging/invalidation_handler_observer.h"
+#include "base/memory/scoped_ptr.h"
+#include "chrome/browser/extensions/api/push_messaging/push_messaging_invalidation_handler_observer.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
 
 class Profile;
 
 namespace extensions {
 
+class PushMessagingInvalidationMapper;
+
 // Observes a single InvalidationHandler and generates onMessage events.
-class PushMessagingEventRouter : public InvalidationHandlerObserver {
+class PushMessagingEventRouter
+    : public PushMessagingInvalidationHandlerObserver,
+      public content::NotificationObserver {
  public:
   explicit PushMessagingEventRouter(Profile* profile);
   virtual ~PushMessagingEventRouter();
 
   void Init();
+  void Shutdown();
+
+  void SetMapperForTest(scoped_ptr<PushMessagingInvalidationMapper> mapper);
 
  private:
   FRIEND_TEST_ALL_PREFIXES(PushMessagingApiTest, EventDispatch);
@@ -31,7 +42,14 @@ class PushMessagingEventRouter : public InvalidationHandlerObserver {
                          int subchannel,
                          const std::string& payload) OVERRIDE;
 
+  // content::NotificationObserver implementation.
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
+  content::NotificationRegistrar registrar_;
   Profile* profile_;
+  scoped_ptr<PushMessagingInvalidationMapper> handler_;
 
   DISALLOW_COPY_AND_ASSIGN(PushMessagingEventRouter);
 };