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

content/browser/media/capture/desktop_capture_device_unittest.cc

Index: content/browser/media/capture/desktop_capture_device_unittest.cc
diff --git a/content/browser/media/capture/desktop_capture_device_unittest.cc b/content/browser/media/capture/desktop_capture_device_unittest.cc
index 883fdc477e1c4d5cde0bb07a43d06092e395ba11..0388043642fb62fc9721ef3c0b33b76c723d7108 100644
--- a/content/browser/media/capture/desktop_capture_device_unittest.cc
+++ b/content/browser/media/capture/desktop_capture_device_unittest.cc
@@ -74,7 +74,7 @@ class InvertedDesktopFrame : public webrtc::DesktopFrame {
     set_capture_time_ms(frame->capture_time_ms());
     mutable_updated_region()->Swap(frame->mutable_updated_region());
   }
-  virtual ~InvertedDesktopFrame() {}
+  ~InvertedDesktopFrame() override {}
 
  private:
   scoped_ptr<webrtc::DesktopFrame> original_frame_;
@@ -90,18 +90,16 @@ class FakeScreenCapturer : public webrtc::ScreenCapturer {
         frame_index_(0),
         generate_inverted_frames_(false) {
   }
-  virtual ~FakeScreenCapturer() {}
+  ~FakeScreenCapturer() override {}
 
   void set_generate_inverted_frames(bool generate_inverted_frames) {
     generate_inverted_frames_ = generate_inverted_frames;
   }
 
   // VideoFrameCapturer interface.
-  virtual void Start(Callback* callback) override {
-    callback_ = callback;
-  }
+  void Start(Callback* callback) override { callback_ = callback; }
 
-  virtual void Capture(const webrtc::DesktopRegion& region) override {
+  void Capture(const webrtc::DesktopRegion& region) override {
     webrtc::DesktopSize size;
     if (frame_index_ % 2 == 0) {
       size = webrtc::DesktopSize(kTestFrameWidth1, kTestFrameHeight1);
@@ -116,17 +114,12 @@ class FakeScreenCapturer : public webrtc::ScreenCapturer {
     callback_->OnCaptureCompleted(frame);
   }
 
-  virtual void SetMouseShapeObserver(
-      MouseShapeObserver* mouse_shape_observer) override {
-  }
+  void SetMouseShapeObserver(
+      MouseShapeObserver* mouse_shape_observer) override {}
 
-  virtual bool GetScreenList(ScreenList* screens) override {
-    return false;
-  }
+  bool GetScreenList(ScreenList* screens) override { return false; }
 
-  virtual bool SelectScreen(webrtc::ScreenId id) override {
-    return false;
-  }
+  bool SelectScreen(webrtc::ScreenId id) override { return false; }
 
  private:
   Callback* callback_;