Standardize usage of virtual/override/final specifiers.

ui/wm/core/nested_accelerator_dispatcher_linux.cc

Index: ui/wm/core/nested_accelerator_dispatcher_linux.cc
diff --git a/ui/wm/core/nested_accelerator_dispatcher_linux.cc b/ui/wm/core/nested_accelerator_dispatcher_linux.cc
index 16a4efb8a29b05bdfd4899f8273b7b6b14f8171e..bc0f49cde790e9ebc7c48ebabfeed552faabe746 100644
--- a/ui/wm/core/nested_accelerator_dispatcher_linux.cc
+++ b/ui/wm/core/nested_accelerator_dispatcher_linux.cc
@@ -51,20 +51,20 @@ class NestedAcceleratorDispatcherLinux : public NestedAcceleratorDispatcher,
       : NestedAcceleratorDispatcher(delegate),
         restore_dispatcher_(OverrideDispatcher(this)) {}
 
-  virtual ~NestedAcceleratorDispatcherLinux() {}
+  ~NestedAcceleratorDispatcherLinux() override {}
 
  private:
   // AcceleratorDispatcher:
-  virtual scoped_ptr<base::RunLoop> CreateRunLoop() override {
+  scoped_ptr<base::RunLoop> CreateRunLoop() override {
     return scoped_ptr<base::RunLoop>(new base::RunLoop());
   }
 
   // ui::PlatformEventDispatcher:
-  virtual bool CanDispatchEvent(const ui::PlatformEvent& event) override {
+  bool CanDispatchEvent(const ui::PlatformEvent& event) override {
     return true;
   }
 
-  virtual uint32_t DispatchEvent(const ui::PlatformEvent& event) override {
+  uint32_t DispatchEvent(const ui::PlatformEvent& event) override {
     if (IsKeyEvent(event)) {
       ui::KeyEvent key_event(event);
       ui::Accelerator accelerator = CreateAcceleratorFromKeyEvent(key_event);