FBTB: Remove unneeded #includes of base/ref_counted.h and base/string16.h in src/chrome.

chrome/renderer/renderer_histogram_snapshots.h

-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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 CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_
 #define CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_
 #pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/histogram.h"
 #include "base/process.h"
-#include "base/scoped_ptr.h"
 #include "base/task.h"
 
 class RendererHistogramSnapshots {
  public:
   RendererHistogramSnapshots();
   ~RendererHistogramSnapshots();
 
   // Send the histogram data.
   void SendHistograms(int sequence_number);
 
@@ skipping 15 matching lines @@
       renderer_histogram_snapshots_factory_;
 
   // For histograms, record what we've already logged (as a sample for each
   // histogram) so that we can send only the delta with the next log.
   LoggedSampleMap logged_samples_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererHistogramSnapshots);
 };
 
 #endif  // CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_