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

content/browser/accessibility/browser_accessibility_win.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_WIN_H_
 #define CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_WIN_H_
 
 #include <atlbase.h>
 #include <atlcom.h>
 #include <oleacc.h>
@@ skipping 73 matching lines @@
   // position where a non-static text child object appears.
   CONTENT_EXPORT static const base::char16 kEmbeddedCharacter;
 
   // Mappings from roles and states to human readable strings. Initialize
   // with |InitializeStringMaps|.
   static std::map<int32, base::string16> role_string_map;
   static std::map<int32, base::string16> state_string_map;
 
   CONTENT_EXPORT BrowserAccessibilityWin();
 
-  CONTENT_EXPORT virtual ~BrowserAccessibilityWin();
+  CONTENT_EXPORT ~BrowserAccessibilityWin() override;
 
   // The Windows-specific unique ID, used as the child ID for MSAA methods
   // like NotifyWinEvent, and as the unique ID for IAccessible2 and ISimpleDOM.
   LONG unique_id_win() const { return unique_id_win_; }
 
   // Called after an atomic tree update completes. See
   // BrowserAccessibilityManagerWin::OnAtomicUpdateFinished for more
   // details on what these do.
   CONTENT_EXPORT void UpdateStep1ComputeWinAttributes();
   CONTENT_EXPORT void UpdateStep2ComputeHypertext();
   CONTENT_EXPORT void UpdateStep3FireEvents(bool is_subtree_creation);
   CONTENT_EXPORT void UpdateStep4DeleteOldWinAttributes();
 
   //
   // BrowserAccessibility methods.
   //
-  CONTENT_EXPORT virtual void OnSubtreeWillBeDeleted() override;
-  CONTENT_EXPORT virtual void NativeAddReference() override;
-  CONTENT_EXPORT virtual void NativeReleaseReference() override;
-  CONTENT_EXPORT virtual bool IsNative() const override;
-  CONTENT_EXPORT virtual void OnLocationChanged() override;
+  CONTENT_EXPORT void OnSubtreeWillBeDeleted() override;
+  CONTENT_EXPORT void NativeAddReference() override;
+  CONTENT_EXPORT void NativeReleaseReference() override;
+  CONTENT_EXPORT bool IsNative() const override;
+  CONTENT_EXPORT void OnLocationChanged() override;
 
   //
   // IAccessible methods.
   //
 
   // Performs the default action on a given object.
   CONTENT_EXPORT STDMETHODIMP accDoDefaultAction(VARIANT var_id) override;
 
   // Retrieves the child element or child object at a given point on the screen.
   CONTENT_EXPORT STDMETHODIMP
@@ skipping 807 matching lines @@
   // Give BrowserAccessibility::Create access to our constructor.
   friend class BrowserAccessibility;
   friend class BrowserAccessibilityRelation;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserAccessibilityWin);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ACCESSIBILITY_BROWSER_ACCESSIBILITY_WIN_H_