Revert of Make LoadMonitoringExtensionHostQueue remove itself as an ExtensionHost observer at the...

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 5d92335da1856cfca170c0ef2158065adac85791..9926161e2904ccf632a79f17f8a4320b9ccb1843 100644
--- a/extensions/browser/extension_host.h
+++ b/extensions/browser/extension_host.h
@@ -59,7 +59,7 @@
   content::WebContents* host_contents() const { return host_contents_.get(); }
   content::RenderViewHost* render_view_host() const;
   content::RenderProcessHost* render_process_host() const;
-  bool has_loaded_once() const { return has_loaded_once_; }
+  bool did_stop_loading() const { return did_stop_loading_; }
   bool document_element_available() const {
     return document_element_available_;
   }
@@ -131,8 +131,8 @@
                            UnloadedExtensionInfo::Reason reason) override;
 
  protected:
-  // Called each time this ExtensionHost completes a load finishes loading,
-  // before any stop-loading notifications or observer methods are called.
+  // Called after the extension page finishes loading but before the
+  // EXTENSION_HOST_DID_STOP_LOADING notification is sent.
   virtual void OnDidStopLoading();
 
   // Navigates to the initial page.
@@ -155,9 +155,6 @@
   void OnIncrementLazyKeepaliveCount();
   void OnDecrementLazyKeepaliveCount();
 
-  // Records UMA for load events.
-  void RecordStopLoadingUMA();
-
   // Delegate for functionality that cannot exist in the extensions module.
   scoped_ptr<ExtensionHostDelegate> delegate_;
 
@@ -178,10 +175,8 @@
   // host, so we can send messages to it before it finishes loading.
   content::RenderViewHost* render_view_host_;
 
-  // Whether the ExtensionHost has finished loading some content at least once.
-  // There may be subsequent loads - such as reloads and navigations - and this
-  // will not affect its value (it will remain true).
-  bool has_loaded_once_;
+  // Whether the RenderWidget has reported that it has stopped loading.
+  bool did_stop_loading_;
 
   // True if the main frame has finished parsing.
   bool document_element_available_;