[Extensions] Short-circuit activity logging if not enabled

extensions/browser/extensions_browser_client.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_EXTENSIONS_BROWSER_CLIENT_H_
 #define EXTENSIONS_BROWSER_EXTENSIONS_BROWSER_CLIENT_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 26 matching lines @@
 class URLRequest;
 class URLRequestJob;
 }
 
 namespace update_client {
 class UpdateClient;
 }
 
 namespace extensions {
 
-class ApiActivityMonitor;
 class ComponentExtensionResourceManager;
 class Extension;
 class ExtensionCache;
 class ExtensionError;
 class ExtensionHostDelegate;
 class ExtensionPrefsObserver;
 class ExtensionApiFrameIdMap;
 class ExtensionApiFrameIdMapHelper;
 class ExtensionSystem;
 class ExtensionSystemProvider;
@@ skipping 112 matching lines @@
   // Permits an external protocol handler to be launched. See
   // ExternalProtocolHandler::PermitLaunchUrl() in Chrome.
   virtual void PermitExternalProtocolHandler() = 0;
 
   // Return true if the system is run in forced app mode.
   virtual bool IsRunningInForcedAppMode() = 0;
 
   // Return true if the user is logged in as a public session.
   virtual bool IsLoggedInAsPublicAccount() = 0;
 
-  // Returns the embedder's ApiActivityMonitor for |context|. Returns NULL if
-  // the embedder does not monitor extension API activity.
-  virtual ApiActivityMonitor* GetApiActivityMonitor(
-      content::BrowserContext* context) = 0;
-
   // Returns the factory that provides an ExtensionSystem to be returned from
   // ExtensionSystem::Get.
   virtual ExtensionSystemProvider* GetExtensionSystemFactory() = 0;
 
   // Registers extension functions not belonging to the core extensions APIs.
   virtual void RegisterExtensionFunctions(
       ExtensionFunctionRegistry* registry) const = 0;
 
   // Registers Mojo services for a RenderFrame.
   virtual void RegisterMojoServices(content::RenderFrameHost* render_frame_host,
@@ skipping 66 matching lines @@
   // Returns the single instance of |this|.
   static ExtensionsBrowserClient* Get();
 
   // Initialize the single instance.
   static void Set(ExtensionsBrowserClient* client);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_EXTENSIONS_BROWSER_CLIENT_H_