Remove keep-alive impulse IPCs from NaCl modules.

content/browser/renderer_host/pepper/browser_ppapi_host_impl.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 CONTENT_BROWSER_RENDERER_HOST_PEPPER_BROWSER_PPAPI_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_PEPPER_BROWSER_PPAPI_HOST_IMPL_H_
 
 #include <map>
 #include <string>
 #include <unordered_map>
@@ skipping 53 matching lines @@
   const base::Process& GetPluginProcess() const override;
   bool IsValidInstance(PP_Instance instance) const override;
   bool GetRenderFrameIDsForInstance(PP_Instance instance,
                                     int* render_process_id,
                                     int* render_frame_id) const override;
   const std::string& GetPluginName() override;
   const base::FilePath& GetPluginPath() override;
   const base::FilePath& GetProfileDataDirectory() override;
   GURL GetDocumentURLForInstance(PP_Instance instance) override;
   GURL GetPluginURLForInstance(PP_Instance instance) override;
-  void SetOnKeepaliveCallback(
-      const BrowserPpapiHost::OnKeepaliveCallback& callback) override;
 
   // Whether the plugin context is secure. That is, it is served from a secure
   // origin and it is embedded within a hierarchy of secure frames. This value
   // comes from the renderer so should not be trusted. It is used for metrics.
   bool IsPotentiallySecurePluginContext(PP_Instance instance);
 
   void set_plugin_process(base::Process process) {
     plugin_process_ = std::move(process);
   }
 
@@ skipping 32 matching lines @@
                       BrowserPpapiHostImpl* browser_ppapi_host_impl);
 
     // IPC::MessageFilter.
     bool OnMessageReceived(const IPC::Message& msg) override;
 
     void OnHostDestroyed();
 
    private:
     ~HostMessageFilter() override;
 
-    void OnKeepalive();
     void OnHostMsgLogInterfaceUsage(int hash) const;
 
     // Non owning pointers cleared in OnHostDestroyed()
     ppapi::host::PpapiHost* ppapi_host_;
     BrowserPpapiHostImpl* browser_ppapi_host_impl_;
   };
 
   struct InstanceData {
     InstanceData(const PepperRendererInstanceData& renderer_data);
     ~InstanceData();
 
     PepperRendererInstanceData renderer_data;
     bool is_throttled;
 
     base::ObserverList<InstanceObserver> observer_list;
   };
 
-  // Reports plugin activity to the callback set with SetOnKeepaliveCallback.
-  void OnKeepalive();
-
   std::unique_ptr<ppapi::host::PpapiHost> ppapi_host_;
   base::Process plugin_process_;
   std::string plugin_name_;
   base::FilePath plugin_path_;
   base::FilePath profile_data_directory_;
 
   // If true, this refers to a plugin running in the renderer process.
   bool in_process_;
 
   // If true, this is an external plugin, i.e. created by the embedder using
   // BrowserPpapiHost::CreateExternalPluginProcess.
   bool external_plugin_;
 
   scoped_refptr<SSLContextHelper> ssl_context_helper_;
 
   // Tracks all PP_Instances in this plugin and associated data.
   std::unordered_map<PP_Instance, std::unique_ptr<InstanceData>> instance_map_;
 
   scoped_refptr<HostMessageFilter> message_filter_;
 
-  BrowserPpapiHost::OnKeepaliveCallback on_keepalive_callback_;
-
   DISALLOW_COPY_AND_ASSIGN(BrowserPpapiHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_BROWSER_PPAPI_HOST_IMPL_H_