Tracking push events for lucid sleep

extensions/browser/extension_host.h

Index: extensions/browser/extension_host.h
diff --git a/extensions/browser/extension_host.h b/extensions/browser/extension_host.h
index 4f815011c2b57a4471e177c292d250f6ca715eda..53e2f243fe0977a598a278fa751f8c9812eec926 100644
--- a/extensions/browser/extension_host.h
+++ b/extensions/browser/extension_host.h
@@ -10,6 +10,7 @@
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
+#include "base/observer_list.h"
 #include "base/timer/elapsed_timer.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ -31,6 +32,7 @@ class SiteInstance;
 namespace extensions {
 class Extension;
 class ExtensionHostDelegate;
+class ExtensionHostObserver;
 class WindowController;
 
 // This class is the browser component of an extension component's RenderView.
@@ -75,6 +77,22 @@ class ExtensionHost : public content::WebContentsDelegate,
   // (can be NULL). This happens delayed to avoid locking the UI.
   void CreateRenderViewSoon();
 
+  // Typical observer interface.
+  void AddObserver(ExtensionHostObserver* observer);
+  void RemoveObserver(ExtensionHostObserver* observer);
+
+  // Called when an IPC message is dispatched to the RenderView associated with
+  // this ExtensionHost.
+  void OnMessageDispatched(const std::string& event_name, int message_id);
+
+  // Called by the ProcessManager when a network request is started by the
+  // extension corresponding to this ExtensionHost.
+  void OnNetworkRequestStarted(uint64 request_id);
+
+  // Called by the ProcessManager when a previously started network request is
+  // finished.
+  void OnNetworkRequestDone(uint64 request_id);
+
   // content::WebContentsObserver
   bool OnMessageReceived(const IPC::Message& message) override;
   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
@@ -135,7 +153,7 @@ class ExtensionHost : public content::WebContentsDelegate,
 
   // Message handlers.
   void OnRequest(const ExtensionHostMsg_Request_Params& params);
-  void OnEventAck();
+  void OnEventAck(int message_id);
   void OnIncrementLazyKeepaliveCount();
   void OnDecrementLazyKeepaliveCount();
 
@@ -178,6 +196,8 @@ class ExtensionHost : public content::WebContentsDelegate,
   // Used to measure how long it's been since the host was created.
   base::ElapsedTimer since_created_;
 
+  ObserverList<ExtensionHostObserver> observer_list_;
+
   DISALLOW_COPY_AND_ASSIGN(ExtensionHost);
 };