Collect profiler stats from browser child processes.

content/browser/profiler_message_filter.cc

+// 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.
+
+#include "content/browser/profiler_message_filter.h"
+
+#include "base/tracked_objects.h"
+#include "base/values.h"
+#include "content/browser/profiler_controller_impl.h"
+#include "content/common/child_process_messages.h"
+
+using content::BrowserThread;
+
+ProfilerMessageFilter::ProfilerMessageFilter() {
+}
+
+ProfilerMessageFilter::~ProfilerMessageFilter() {
+}
+
+void ProfilerMessageFilter::OnChannelConnected(int32 peer_pid) {
+  BrowserMessageFilter::OnChannelConnected(peer_pid);
+
+  bool enable = tracked_objects::ThreadData::tracking_status();
+  Send(new ChildProcessMsg_SetProfilerStatus(enable));
+}
+
+bool ProfilerMessageFilter::OnMessageReceived(const IPC::Message& message,
+                                              bool* message_was_ok) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP_EX(ProfilerMessageFilter, message, *message_was_ok)
+    IPC_MESSAGE_HANDLER(ChildProcessHostMsg_ChildProfilerData,
+                        OnChildProfilerData)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP_EX()
+  return handled;
+}
+
+void ProfilerMessageFilter::OnChildProfilerData(
+    int sequence_number,
+    const base::DictionaryValue& profiler_data) {
+  base::DictionaryValue* dictionary_value = new base::DictionaryValue;
+  dictionary_value->MergeDictionary(&profiler_data);
+  // OnProfilerDataCollected assumes the ownership of profiler_data.
+  content::ProfilerControllerImpl::GetInstance()->OnProfilerDataCollected(
+      sequence_number, dictionary_value);
+}