Move a bunch of code in content\renderer to the content namespace.

content/renderer/load_progress_tracker.h

 // 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.
 
 #ifndef CONTENT_RENDERER_LOAD_PROGRESS_TRACKER_H_
 #define CONTENT_RENDERER_LOAD_PROGRESS_TRACKER_H_
 
 #include "base/logging.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time.h"
 
-class RenderViewImpl;
-
 namespace WebKit {
 class WebFrame;
 }
 
+namespace content {
+class RenderViewImpl;
+
 class LoadProgressTracker {
  public:
   explicit LoadProgressTracker(RenderViewImpl* render_view);
   ~LoadProgressTracker();
 
   void DidStopLoading();
 
   void DidChangeLoadProgress(WebKit::WebFrame* frame, double progress);
 
  private:
   void ResetStates();
 
   void SendChangeLoadProgress();
 
   RenderViewImpl* render_view_;
 
   WebKit::WebFrame* tracked_frame_;
 
   double progress_;
 
   base::TimeTicks last_time_progress_sent_;
 
   base::WeakPtrFactory<LoadProgressTracker> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LoadProgressTracker);
 };
 
+}  // namespace content
+
 #endif  // CONTENT_RENDERER_LOAD_PROGRESS_TRACKER_H_