[tracing] Send unique tracing process id for cross-process memory dumps identification.

content/browser/browser_child_process_host_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/browser_child_process_host_impl.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/dump_without_crashing.h"
@@ skipping 94 matching lines @@
 
 BrowserChildProcessHostImpl::BrowserChildProcessHostImpl(
     content::ProcessType process_type,
     BrowserChildProcessHostDelegate* delegate)
     : data_(process_type),
       delegate_(delegate),
       power_monitor_message_broadcaster_(this) {
   data_.id = ChildProcessHostImpl::GenerateChildProcessUniqueId();
 
   child_process_host_.reset(ChildProcessHost::Create(this));
-  AddFilter(new TraceMessageFilter);
+  AddFilter(new TraceMessageFilter(data_.id));
   AddFilter(new ProfilerMessageFilter(process_type));
   AddFilter(new HistogramMessageFilter);
 
   g_child_process_list.Get().push_back(this);
   GetContentClient()->browser()->BrowserChildProcessHostCreated(this);
 
   power_monitor_message_broadcaster_.Init();
 }
 
 BrowserChildProcessHostImpl::~BrowserChildProcessHostImpl() {
@@ skipping 249 matching lines @@
 
 #if defined(OS_WIN)
 
 void BrowserChildProcessHostImpl::OnObjectSignaled(HANDLE object) {
   OnChildDisconnected();
 }
 
 #endif
 
 }  // namespace content