Collect profiler stats from browser child processes.

content/browser/profiler_message_filter.h

+// Copyright (c) 2011 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_PROFILER_MESSAGE_FILTER_H_
+#define CONTENT_BROWSER_PROFILER_MESSAGE_FILTER_H_
+
+#include <string>
+
+#include "content/browser/browser_message_filter.h"
+
+namespace base {
+class DictionaryValue;
+}
+
+// This class sends and receives profiler messages in the browser process.
+class ProfilerMessageFilter : public BrowserMessageFilter {
+ public:
+  ProfilerMessageFilter();
+  virtual ~ProfilerMessageFilter();
+
+  // BrowserMessageFilter implementation.
+  virtual void OnChannelConnected(int32 peer_pid);
+
+  // BrowserMessageFilter implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message,
+                                 bool* message_was_ok);
+
+ private:
+  // Message handlers. It calls ProfilerControllerImpl's OnProfilerDataCollected

[jam, 2011/11/30 00:22:25]

don't comment on what the function is doing. anyone can see that when they look
at it. see

http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml?showone=Implem...

"Note that you should never describe the code itself. Assume that the person
reading the code knows C++ better than you do, even though he or she does not
know what you are trying to do"

[ramant (doing other things), 2011/11/30 19:37:21]

Done.

+  // to send the profiler_data.
+  void OnChildProfilerData(int sequence_number,
+                           const base::DictionaryValue& profiler_data);
+
+  DISALLOW_COPY_AND_ASSIGN(ProfilerMessageFilter);
+};
+
+#endif  // CONTENT_BROWSER_PROFILER_MESSAGE_FILTER_H_
+