Test Keeping NaCl plugins used in app background pages alive when active.

extensions/browser/process_manager.h

 // Copyright 2013 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 EXTENSIONS_BROWSER_PROCESS_MANAGER_H_
 #define EXTENSIONS_BROWSER_PROCESS_MANAGER_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 107 matching lines @@
   // background hosts will be created.  Defaults to false.
   void DeferBackgroundHostCreation(bool defer);
 
   // Ensures background hosts are loaded for a new browser window.
   void OnBrowserWindowReady();
 
   // Gets the BrowserContext associated with site_instance_ and all other
   // related SiteInstances.
   content::BrowserContext* GetBrowserContext() const;
 
+  // Sets callbacks for testing keepalive impulse behavior.
+  typedef base::Callback<void(const std::string& extension_id)>
+      ImpulseCallbackForTesting;
+  void SetKeepaliveImpulseCallbackForTesting(
+      const ImpulseCallbackForTesting& callback);
+  void SetKeepaliveImpulseDecrementCallbackForTesting(
+      const ImpulseCallbackForTesting& callback);
+
  protected:
   // If |context| is incognito pass the master context as |original_context|.
   // Otherwise pass the same context for both.
   ProcessManager(content::BrowserContext* context,
                  content::BrowserContext* original_context);
 
   // Called on browser shutdown to close our extension hosts.
   void CloseBackgroundHosts();
 
   // content::NotificationObserver:
@@ skipping 78 matching lines @@
   base::TimeDelta event_page_suspending_time_;
 
   // If true, then creation of background hosts is suspended.
   bool defer_background_host_creation_;
 
   // True if we have created the startup set of background hosts.
   bool startup_background_hosts_created_;
 
   base::Callback<void(content::DevToolsAgentHost*, bool)> devtools_callback_;
 
+  ImpulseCallbackForTesting keepalive_impulse_callback_for_testing_;
+  ImpulseCallbackForTesting keepalive_impulse_decrement_callback_for_testing_;
+
   base::WeakPtrFactory<ProcessManager> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessManager);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_PROCESS_MANAGER_H_