Enforce marking "override" for functions overriding Blink in components/test_runner/.

components/test_runner/mock_screen_orientation_client.h

 // 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.
 
 #ifndef COMPONENTS_TEST_RUNNER_MOCK_SCREEN_ORIENTATION_CLIENT_H_
 #define COMPONENTS_TEST_RUNNER_MOCK_SCREEN_ORIENTATION_CLIENT_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/test_runner/test_runner_export.h"
 #include "third_party/WebKit/public/platform/modules/screen_orientation/WebLockOrientationCallback.h"
 #include "third_party/WebKit/public/platform/modules/screen_orientation/WebScreenOrientationClient.h"
 #include "third_party/WebKit/public/platform/modules/screen_orientation/WebScreenOrientationLockType.h"
 #include "third_party/WebKit/public/platform/modules/screen_orientation/WebScreenOrientationType.h"
 
 namespace blink {
 class WebLocalFrame;
 }
 
 namespace test_runner {
 
 class TEST_RUNNER_EXPORT MockScreenOrientationClient
     : public NON_EXPORTED_BASE(blink::WebScreenOrientationClient) {
  public:
   explicit MockScreenOrientationClient();
-  virtual ~MockScreenOrientationClient();
+  ~MockScreenOrientationClient() override;
 
   void ResetData();
   void UpdateDeviceOrientation(blink::WebLocalFrame* main_frame,
                                blink::WebScreenOrientationType orientation);
 
   blink::WebScreenOrientationType CurrentOrientationType() const;
   unsigned CurrentOrientationAngle() const;
 
  private:
   // From blink::WebScreenOrientationClient.
-  virtual void lockOrientation(blink::WebScreenOrientationLockType orientation,
-                               blink::WebLockOrientationCallback* callback);
-  virtual void unlockOrientation();
+  void lockOrientation(blink::WebScreenOrientationLockType orientation,
+                       blink::WebLockOrientationCallback* callback) override;
+  void unlockOrientation() override;
 
   void UpdateLockSync(blink::WebScreenOrientationLockType,
                       blink::WebLockOrientationCallback*);
   void ResetLockSync();
 
   void UpdateScreenOrientation(blink::WebScreenOrientationType);
   bool IsOrientationAllowedByCurrentLock(blink::WebScreenOrientationType);
   blink::WebScreenOrientationType SuitableOrientationForCurrentLock();
   static unsigned OrientationTypeToAngle(blink::WebScreenOrientationType);
 
   blink::WebLocalFrame* main_frame_;
   blink::WebScreenOrientationLockType current_lock_;
   blink::WebScreenOrientationType device_orientation_;
   blink::WebScreenOrientationType current_orientation_;
 
   DISALLOW_COPY_AND_ASSIGN(MockScreenOrientationClient);
 };
 
 }  // namespace test_runner
 
 #endif  // COMPONENTS_TEST_RUNNER_MOCK_SCREEN_ORIENTATION_CLIENT_H_