Standardize usage of virtual/override/final in extensions/

extensions/browser/api/power/power_api_unittest.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 "extensions/browser/api/power/power_api.h"
 
 #include <deque>
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 29 matching lines @@
 };
 
 // Stub implementation of content::PowerSaveBlocker that just runs a
 // callback on destruction.
 class PowerSaveBlockerStub : public content::PowerSaveBlocker {
  public:
   explicit PowerSaveBlockerStub(base::Closure unblock_callback)
       : unblock_callback_(unblock_callback) {
   }
 
-  virtual ~PowerSaveBlockerStub() {
-    unblock_callback_.Run();
-  }
+  ~PowerSaveBlockerStub() override { unblock_callback_.Run(); }
 
  private:
   base::Closure unblock_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerSaveBlockerStub);
 };
 
 // Manages PowerSaveBlockerStub objects.  Tests can instantiate this class
 // to make PowerApiManager's calls to create PowerSaveBlockers record the
 // actions that would've been performed instead of actually blocking and
@@ skipping 207 matching lines @@
   EXPECT_EQ(NONE, manager_->PopFirstRequest());
 
   // Make the first extension block display-sleep again.
   ASSERT_TRUE(CallFunction(REQUEST, kDisplayArgs, extension()));
   EXPECT_EQ(BLOCK_DISPLAY_SLEEP, manager_->PopFirstRequest());
   EXPECT_EQ(UNBLOCK_APP_SUSPENSION, manager_->PopFirstRequest());
   EXPECT_EQ(NONE, manager_->PopFirstRequest());
 }
 
 }  // namespace extensions