Implement the gamepad API in the IPC proxy

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 "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "content/browser/renderer_host/pepper/content_browser_pepper_host_factory.h"
+#include "content/common/content_export.h"
 #include "content/public/browser/browser_ppapi_host.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ppapi/host/ppapi_host.h"
 
 namespace IPC {
 class Sender;
 }
 
 namespace content {
 
-class BrowserPpapiHostImpl : public BrowserPpapiHost,
-                             public IPC::ChannelProxy::MessageFilter {
+class CONTENT_EXPORT BrowserPpapiHostImpl
+    : public BrowserPpapiHost,
+      public IPC::ChannelProxy::MessageFilter {
  public:
+  // The creator is responsible for calling set_plugin_process_handle as soon
+  // as it is known (we start the process asynchronously so it won't be known
+  // when this object is created).
   BrowserPpapiHostImpl(IPC::Sender* sender,
                        const ppapi::PpapiPermissions& permissions);
 
   // IPC::ChannelProxy::MessageFilter.
   virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
 
   // BrowserPpapiHost.
   virtual ppapi::host::PpapiHost* GetPpapiHost() OVERRIDE;
+  virtual base::ProcessHandle GetPluginProcessHandle() const OVERRIDE;
+
+  void set_plugin_process_handle(base::ProcessHandle handle) {
+    plugin_process_handle_ = handle;
+  }
 
  private:
+  friend class BrowserPpapiHostTest;
+
   virtual ~BrowserPpapiHostImpl();
 
   ContentBrowserPepperHostFactory host_factory_;
   ppapi::host::PpapiHost ppapi_host_;
+  base::ProcessHandle plugin_process_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPpapiHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_BROWSER_PPAPI_HOST_IMPL_H_