Add a hang monitor for Pepper plugins

content/browser/plugin_data_remover_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/plugin_data_remover_impl.h"
 
 #include "base/bind.h"
 #include "base/metrics/histogram.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/utf_string_conversions.h"
@@ skipping 150 matching lines @@
   }
 
   // PpapiPluginProcessHost::BrokerClient implementation.
   virtual void GetPpapiChannelInfo(base::ProcessHandle* renderer_handle,
                                    int* renderer_id) OVERRIDE {
     *renderer_id = 0;
   }
 
   virtual void OnPpapiChannelOpened(
       base::ProcessHandle plugin_process_handle,
-      const IPC::ChannelHandle& channel_handle) OVERRIDE {
+      const IPC::ChannelHandle& channel_handle,
+      int /* child_id */) OVERRIDE {
     if (plugin_process_handle != base::kNullProcessHandle)
       ConnectToChannel(channel_handle, true);
 
     // Balancing the AddRef call.
     Release();
   }
 
   // IPC::Channel::Listener methods.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE {
     IPC_BEGIN_MESSAGE_MAP(Context, message)
@@ skipping 107 matching lines @@
 
 base::WaitableEvent* PluginDataRemoverImpl::StartRemoving(
     base::Time begin_time) {
   DCHECK(!context_.get());
   context_ = new Context(begin_time, browser_context_);
   context_->Init(mime_type_);
   return context_->event();
 }
 
 }  // namespace content