Update {virtual,override,final} to follow C++11 style.

content/browser/android/in_process/synchronous_compositor_factory_impl.cc

Index: content/browser/android/in_process/synchronous_compositor_factory_impl.cc
diff --git a/content/browser/android/in_process/synchronous_compositor_factory_impl.cc b/content/browser/android/in_process/synchronous_compositor_factory_impl.cc
index 2ae331b00706d1920c31c39e044b4f509953ce06..1e779ce666867a933c6f636d62170e6f0c4b5af0 100644
--- a/content/browser/android/in_process/synchronous_compositor_factory_impl.cc
+++ b/content/browser/android/in_process/synchronous_compositor_factory_impl.cc
@@ -127,21 +127,20 @@ class SynchronousCompositorFactoryImpl::VideoContextProvider
     context_provider_->BindToCurrentThread();
   }
 
-  virtual scoped_refptr<gfx::SurfaceTexture> GetSurfaceTexture(
+  scoped_refptr<gfx::SurfaceTexture> GetSurfaceTexture(
       uint32 stream_id) override {
     return gl_in_process_context_->GetSurfaceTexture(stream_id);
   }
 
-  virtual gpu::gles2::GLES2Interface* ContextGL() override {
+  gpu::gles2::GLES2Interface* ContextGL() override {
     return context_provider_->ContextGL();
   }
 
-  virtual void AddObserver(StreamTextureFactoryContextObserver* obs) override {
+  void AddObserver(StreamTextureFactoryContextObserver* obs) override {
     observer_list_.AddObserver(obs);
   }
 
-  virtual void RemoveObserver(
-      StreamTextureFactoryContextObserver* obs) override {
+  void RemoveObserver(StreamTextureFactoryContextObserver* obs) override {
     observer_list_.RemoveObserver(obs);
   }
 
@@ -153,7 +152,7 @@ class SynchronousCompositorFactoryImpl::VideoContextProvider
 
  private:
   friend class base::RefCountedThreadSafe<VideoContextProvider>;
-  virtual ~VideoContextProvider() {}
+  ~VideoContextProvider() override {}
 
   scoped_refptr<cc::ContextProvider> context_provider_;
   gpu::GLInProcessContext* gl_in_process_context_;