Move remaining files in content\browser\renderer_host to content namespace.

content/browser/renderer_host/text_input_client_mac.mm

 // 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.
 
 #import "content/browser/renderer_host/text_input_client_mac.h"
 
 #include "base/memory/singleton.h"
 #include "base/metrics/histogram.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/time.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/common/text_input_client_messages.h"
 
-using content::RenderWidgetHost;
-using content::RenderWidgetHostImpl;
+namespace content {
 
 // The amount of time in milliseconds that the browser process will wait for a
 // response from the renderer.
 // TODO(rsesek): Using the histogram data, find the best upper-bound for this
 // value.
 const float kWaitTimeout = 1500;
 
 TextInputClientMac::TextInputClientMac()
     : character_index_(NSNotFound),
       lock_(),
@@ skipping 104 matching lines @@
                            delta * base::Time::kMicrosecondsPerMillisecond);
 
   character_index_ = NSNotFound;
   first_rect_ = NSZeroRect;
   substring_.reset();
 }
 
 void TextInputClientMac::AfterRequest() {
   lock_.Release();
 }
+
+}  // namespace content