content/browser: Move more files into the content namespace.

content/browser/trace_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/trace_message_filter.h"
 
 #include "content/browser/trace_controller_impl.h"
 #include "content/common/child_process_messages.h"
 
-using content::BrowserMessageFilter;
-using content::BrowserThread;
-using content::TraceControllerImpl;
+namespace content {
 
-TraceMessageFilter::TraceMessageFilter() :
-    has_child_(false),
-    is_awaiting_end_ack_(false),
-    is_awaiting_buffer_percent_full_ack_(false) {
+TraceMessageFilter::TraceMessageFilter()
+    : has_child_(false),
+      is_awaiting_end_ack_(false),
+      is_awaiting_buffer_percent_full_ack_(false) {
 }
 
 void TraceMessageFilter::OnFilterAdded(IPC::Channel* channel) {
   // Always on IO thread (BrowserMessageFilter guarantee).
   BrowserMessageFilter::OnFilterAdded(channel);
 }
 
 void TraceMessageFilter::OnChannelClosing() {
   // Always on IO thread (BrowserMessageFilter guarantee).
   BrowserMessageFilter::OnChannelClosing();
@@ skipping 91 matching lines @@
 void TraceMessageFilter::OnTraceBufferPercentFullReply(float percent_full) {
   if (is_awaiting_buffer_percent_full_ack_) {
     is_awaiting_buffer_percent_full_ack_ = false;
     TraceControllerImpl::GetInstance()->OnTraceBufferPercentFullReply(
         percent_full);
   } else {
     NOTREACHED();
   }
 }
 
+}  // namespace content