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

content/renderer/gpu/render_widget_compositor_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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include "cc/output/begin_frame_args.h"
 #include "content/public/test/mock_render_thread.h"
 #include "content/renderer/render_widget.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ skipping 17 matching lines @@
                      blink::WebScreenInfo(),
                      true,
                      false,
                      false) {
     webwidget_ = &mock_webwidget_;
   }
 
   MockWebWidget mock_webwidget_;
 
  private:
-  virtual ~TestRenderWidget() { webwidget_ = NULL; }
+  ~TestRenderWidget() override { webwidget_ = NULL; }
 
   DISALLOW_COPY_AND_ASSIGN(TestRenderWidget);
 };
 
 class RenderWidgetCompositorTest : public testing::Test {
  public:
   RenderWidgetCompositorTest()
       : render_widget_(make_scoped_refptr(new TestRenderWidget())),
         render_widget_compositor_(
             RenderWidgetCompositor::Create(render_widget_.get(), false)) {}
@@ skipping 19 matching lines @@
   EXPECT_CALL(render_widget_->mock_webwidget_,
               beginFrame(AllOf(
                   Field(&blink::WebBeginFrameArgs::lastFrameTimeMonotonic, 1),
                   Field(&blink::WebBeginFrameArgs::deadline, 2),
                   Field(&blink::WebBeginFrameArgs::interval, 3))));
 
   render_widget_compositor_->BeginMainFrame(args);
 }
 
 }  // namespace content