Simplify ExtensionProcessManager to only load extension background pages when a browser window is o…

chrome/browser/extensions/extension_process_manager.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESS_MANAGER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESS_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 177 matching lines @@
   void CloseLazyBackgroundPageNow(const std::string& extension_id,
                                   int sequence_id);
 
   // Potentially registers a RenderViewHost, if it is associated with an
   // extension. Does nothing if this is not an extension renderer.
   void RegisterRenderViewHost(content::RenderViewHost* render_view_host);
 
   // Clears background page data for this extension.
   void ClearBackgroundPageData(const std::string& extension_id);
 
-  // Returns true if loading background pages should be deferred. This is
-  // true if there are no browser windows open and the browser process was
-  // started to show the app launcher.
-  bool DeferLoadingBackgroundHosts() const;
-
   // Contains all active extension-related RenderViewHost instances for all
   // extensions. We also keep a cache of the host's view type, because that
   // information is not accessible at registration/deregistration time.
   ExtensionRenderViews all_extension_views_;
 
   BackgroundPageDataMap background_page_data_;
 
   // The time to delay between an extension becoming idle and
   // sending a ShouldSuspend message; read from command-line switch.
   base::TimeDelta event_page_idle_time_;
 
   // The time to delay between sending a ShouldSuspend message and
   // sending a Suspend message; read from command-line switch.
   base::TimeDelta event_page_suspending_time_;
 
   base::WeakPtrFactory<ExtensionProcessManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionProcessManager);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_PROCESS_MANAGER_H_