Standardize usage of virtual/override/final specifiers.

content/browser/media/capture/desktop_capture_device_aura.h

Index: content/browser/media/capture/desktop_capture_device_aura.h
diff --git a/content/browser/media/capture/desktop_capture_device_aura.h b/content/browser/media/capture/desktop_capture_device_aura.h
index 7b5a344ca3b94aea2aebad8e7ae40646e358dbe8..8f3540a7fd6f4b2887525917273ae2531877668a 100644
--- a/content/browser/media/capture/desktop_capture_device_aura.h
+++ b/content/browser/media/capture/desktop_capture_device_aura.h
@@ -27,12 +27,12 @@ class CONTENT_EXPORT DesktopCaptureDeviceAura
   // Creates a VideoCaptureDevice for the Aura desktop.
   static media::VideoCaptureDevice* Create(const DesktopMediaID& source);
 
-  virtual ~DesktopCaptureDeviceAura();
+  ~DesktopCaptureDeviceAura() override;
 
   // VideoCaptureDevice implementation.
-  virtual void AllocateAndStart(const media::VideoCaptureParams& params,
-                                scoped_ptr<Client> client) override;
-  virtual void StopAndDeAllocate() override;
+  void AllocateAndStart(const media::VideoCaptureParams& params,
+                        scoped_ptr<Client> client) override;
+  void StopAndDeAllocate() override;
 
  private:
   DesktopCaptureDeviceAura(const DesktopMediaID& source);