Implement the gamepad API in the IPC proxy

content/browser/renderer_host/pepper/browser_ppapi_host_impl.cc

 // 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.
 
 #include "content/browser/renderer_host/pepper/browser_ppapi_host_impl.h"
 
 #include "ipc/ipc_message_macros.h"
 
 namespace content {
 
 BrowserPpapiHostImpl::BrowserPpapiHostImpl(
     IPC::Sender* sender,
     const ppapi::PpapiPermissions& permissions)
     : host_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
-      ppapi_host_(sender, &host_factory_, permissions) {
+      ppapi_host_(sender, &host_factory_, permissions),
+      plugin_process_handle_(base::kNullProcessHandle) {
 }
 
 BrowserPpapiHostImpl::~BrowserPpapiHostImpl() {
 }
 
 bool BrowserPpapiHostImpl::OnMessageReceived(const IPC::Message& msg) {
   /* TODO(brettw) when we add messages, here, the code should look like this:
   bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(BrowserPpapiHostImpl, msg)
     // Add necessary message handlers here.
     IPC_MESSAGE_UNHANDLED(handled = ppapi_host_.OnMessageReceived(msg))
   IPC_END_MESSAGE_MAP();
   return handled;
   */
   return ppapi_host_.OnMessageReceived(msg);
 }
 
 ppapi::host::PpapiHost* BrowserPpapiHostImpl::GetPpapiHost() {
   return &ppapi_host_;
 }
 
+base::ProcessHandle BrowserPpapiHostImpl::GetPluginProcessHandle() const {
+  // Handle should previously have been set before use.
+  DCHECK(plugin_process_handle_ != base::kNullProcessHandle);
+  return plugin_process_handle_;
+}
+
 }  // namespace content