Standardize usage of virtual/override/final in chrome/browser/extensions/

chrome/browser/extensions/api/automation_internal/automation_internal_api.cc

Index: chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
diff --git a/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc b/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
index 7fe564e4bfde192e56985bb45c96f8dc3aa9e667..40e184bbf3b64d5776b523af8abb94ca9feb063d 100644
--- a/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
+++ b/chrome/browser/extensions/api/automation_internal/automation_internal_api.cc
@@ -69,10 +69,10 @@ class AutomationWebContentsObserver
     : public content::WebContentsObserver,
       public content::WebContentsUserData<AutomationWebContentsObserver> {
  public:
-  virtual ~AutomationWebContentsObserver() {}
+  ~AutomationWebContentsObserver() override {}
 
   // content::WebContentsObserver overrides.
-  virtual void AccessibilityEventReceived(
+  void AccessibilityEventReceived(
       const std::vector<content::AXEventNotificationDetails>& details)
       override {
     automation_util::DispatchAccessibilityEventsToAutomation(
@@ -80,7 +80,7 @@ class AutomationWebContentsObserver
         web_contents()->GetContainerBounds().OffsetFromOrigin());
   }
 
-  virtual void RenderFrameDeleted(
+  void RenderFrameDeleted(
       content::RenderFrameHost* render_frame_host) override {
     automation_util::DispatchTreeDestroyedEventToAutomation(
         render_frame_host->GetProcess()->GetID(),
@@ -110,19 +110,15 @@ class RenderFrameHostActionAdapter : public AutomationActionAdapter {
   virtual ~RenderFrameHostActionAdapter() {}
 
   // AutomationActionAdapter implementation.
-  virtual void DoDefault(int32 id) override {
-    rfh_->AccessibilityDoDefaultAction(id);
-  }
+  void DoDefault(int32 id) override { rfh_->AccessibilityDoDefaultAction(id); }
 
-  virtual void Focus(int32 id) override {
-    rfh_->AccessibilitySetFocus(id);
-  }
+  void Focus(int32 id) override { rfh_->AccessibilitySetFocus(id); }
 
-  virtual void MakeVisible(int32 id) override {
+  void MakeVisible(int32 id) override {
     rfh_->AccessibilityScrollToMakeVisible(id, gfx::Rect());
   }
 
-  virtual void SetSelection(int32 id, int32 start, int32 end) override {
+  void SetSelection(int32 id, int32 start, int32 end) override {
     rfh_->AccessibilitySetTextSelection(id, start, end);
   }