Add OVERRIDE to chrome/renderer.

chrome/renderer/renderer_histogram_snapshots.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 CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_
 #define CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 11 matching lines @@
                                    public content::RenderProcessObserver {
  public:
   RendererHistogramSnapshots();
   virtual ~RendererHistogramSnapshots();
 
   // Send the histogram data.
   void SendHistograms(int sequence_number);
 
  private:
   // RenderProcessObserver implementation.
-  virtual bool OnControlMessageReceived(const IPC::Message& message);
+  virtual bool OnControlMessageReceived(const IPC::Message& message) OVERRIDE;
 
   void OnGetRendererHistograms(int sequence_number);
 
   // Maintain a map of histogram names to the sample stats we've sent.
   typedef std::map<std::string, base::Histogram::SampleSet> LoggedSampleMap;
   typedef std::vector<std::string> HistogramPickledList;
 
   // Extract snapshot data and then send it off the the Browser process.
   // Send only a delta to what we have already sent.
   void UploadAllHistrograms(int sequence_number);
 
   base::WeakPtrFactory<RendererHistogramSnapshots> weak_factory_;
 
   // HistogramSender interface (override) methods.
   virtual void TransmitHistogramDelta(
       const base::Histogram& histogram,
-      const base::Histogram::SampleSet& snapshot);
-  virtual void InconsistencyDetected(int problem);
-  virtual void UniqueInconsistencyDetected(int problem);
-  virtual void SnapshotProblemResolved(int amount);
+      const base::Histogram::SampleSet& snapshot) OVERRIDE;
+  virtual void InconsistencyDetected(int problem) OVERRIDE;
+  virtual void UniqueInconsistencyDetected(int problem) OVERRIDE;
+  virtual void SnapshotProblemResolved(int amount) OVERRIDE;
 
   // Collection of histograms to send to the browser.
   HistogramPickledList pickled_histograms_;
 
   DISALLOW_COPY_AND_ASSIGN(RendererHistogramSnapshots);
 };
 
 #endif  // CHROME_RENDERER_RENDERER_HISTOGRAM_SNAPSHOTS_H_