Standardize usage of virtual/override/final in chrome/browser/

chrome/browser/metrics/chrome_metrics_service_client.cc

 // Copyright 2014 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 "chrome/browser/metrics/chrome_metrics_service_client.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 88 matching lines @@
 // Will run the provided task after finished.
 class MetricsMemoryDetails : public MemoryDetails {
  public:
   MetricsMemoryDetails(
       const base::Closure& callback,
       MemoryGrowthTracker* memory_growth_tracker)
       : callback_(callback) {
     SetMemoryGrowthTracker(memory_growth_tracker);
   }
 
-  virtual void OnDetailsAvailable() override {
+  void OnDetailsAvailable() override {
     base::MessageLoop::current()->PostTask(FROM_HERE, callback_);
   }
 
  private:
-  virtual ~MetricsMemoryDetails() {}
+  ~MetricsMemoryDetails() override {}
 
   base::Closure callback_;
 
   DISALLOW_COPY_AND_ASSIGN(MetricsMemoryDetails);
 };
 
 }  // namespace
 
 ChromeMetricsServiceClient::ChromeMetricsServiceClient(
     metrics::MetricsStateManager* state_manager)
@@ skipping 422 matching lines @@
   // Capture the histogram samples.
   if (dumps_with_crash != 0)
     UMA_HISTOGRAM_COUNTS("Chrome.BrowserDumpsWithCrash", dumps_with_crash);
   if (dumps_with_no_crash != 0)
     UMA_HISTOGRAM_COUNTS("Chrome.BrowserDumpsWithNoCrash", dumps_with_no_crash);
   int total_dumps = dumps_with_crash + dumps_with_no_crash;
   if (total_dumps != 0)
     UMA_HISTOGRAM_COUNTS("Chrome.BrowserCrashDumpAttempts", total_dumps);
 }
 #endif  // defined(OS_WIN)