[PowerProfiler] Power profiler service keeps running even after devtools frontend has been closed.

content/browser/devtools/render_view_devtools_agent_host.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/devtools/render_view_devtools_agent_host.h"
 
 #include "base/basictypes.h"
 #include "base/lazy_instance.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/devtools/devtools_manager_impl.h"
@@ skipping 148 matching lines @@
     const IPC::Message& message) {
   RenderViewDevToolsAgentHost* agent_host = FindAgentHost(source);
   return agent_host && agent_host->DispatchIPCMessage(message);
 }
 
 RenderViewDevToolsAgentHost::RenderViewDevToolsAgentHost(RenderViewHost* rvh)
     : render_view_host_(NULL),
       overrides_handler_(new RendererOverridesHandler(this)),
       tracing_handler_(
           new DevToolsTracingHandler(DevToolsTracingHandler::Renderer)),
-      power_handler_(new DevToolsPowerHandler()),
+      power_handler_(new DevToolsPowerHandler(this)),
       reattaching_(false) {
   SetRenderViewHost(rvh);
   DevToolsProtocol::Notifier notifier(base::Bind(
       &RenderViewDevToolsAgentHost::OnDispatchOnInspectorFrontend,
       base::Unretained(this)));
   overrides_handler_->SetNotifier(notifier);
   tracing_handler_->SetNotifier(notifier);
   power_handler_->SetNotifier(notifier);
   g_instances.Get().push_back(this);
   AddRef();  // Balanced in RenderViewHostDestroyed.
@@ skipping 285 matching lines @@
 
 void RenderViewDevToolsAgentHost::OnDispatchOnInspectorFrontend(
     const std::string& message) {
   if (!render_view_host_)
     return;
   DevToolsManagerImpl::GetInstance()->DispatchOnInspectorFrontend(
       this, message);
 }
 
 }  // namespace content