Move BrowserMessageFilter to public, and into content namespace.

content/browser/trace_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/trace_message_filter.h"
 
 #include "content/browser/trace_controller.h"
 #include "content/common/child_process_messages.h"
 
+using content::BrowserMessageFilter;
 using content::BrowserThread;
 
 TraceMessageFilter::TraceMessageFilter() :
     has_child_(false),
     is_awaiting_end_ack_(false),
     is_awaiting_bpf_ack_(false) {
 }
 
 TraceMessageFilter::~TraceMessageFilter() {
 }
@@ skipping 84 matching lines @@
 }
 
 void TraceMessageFilter::OnTraceBufferPercentFullReply(float percent_full) {
   if (is_awaiting_bpf_ack_) {
     is_awaiting_bpf_ack_ = false;
     TraceController::GetInstance()->OnTraceBufferPercentFullReply(
         percent_full);
   }
 }