[UMA] Use proper C++ objects to serialize tracked_objects across process boundaries.

content/browser/profiler_message_filter.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/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::BrowserMessageFilter;
-using content::BrowserThread;
+namespace content {
 
-ProfilerMessageFilter::ProfilerMessageFilter() {
+ProfilerMessageFilter::ProfilerMessageFilter(ProcessType process_type)
+    : process_type_(process_type) {
 }
 
 ProfilerMessageFilter::~ProfilerMessageFilter() {
 }
 
 void ProfilerMessageFilter::OnChannelConnected(int32 peer_pid) {
   BrowserMessageFilter::OnChannelConnected(peer_pid);
 
   tracked_objects::ThreadData::Status status =
       tracked_objects::ThreadData::status();
   Send(new ChildProcessMsg_SetProfilerStatus(status));
 }
 
 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);
+    const tracked_objects::ProcessDataSnapshot& profiler_data) {
+  ProfilerControllerImpl::GetInstance()->OnProfilerDataCollected(
+      sequence_number, profiler_data, process_type_);
 }
+
+}