Add OVERRIDE to ui/.

ui/gfx/platform_font_mac.h

Index: ui/gfx/platform_font_mac.h
diff --git a/ui/gfx/platform_font_mac.h b/ui/gfx/platform_font_mac.h
index 64ae669ec7ebfa2ebe431e85753c8c95b59ae830..60076152b059013024b5fa206e15b8fa5c08b00b 100644
--- a/ui/gfx/platform_font_mac.h
+++ b/ui/gfx/platform_font_mac.h
@@ -6,6 +6,7 @@
 #define UI_GFX_PLATFORM_FONT_MAC_H_
 #pragma once
 
+#include "base/compiler_specific.h"
 #include "ui/gfx/platform_font.h"
 
 namespace gfx {
@@ -19,16 +20,16 @@ class PlatformFontMac : public PlatformFont {
                   int font_size);
 
   // Overridden from PlatformFont:
-  virtual Font DeriveFont(int size_delta, int style) const;
-  virtual int GetHeight() const;
-  virtual int GetBaseline() const;
-  virtual int GetAverageCharacterWidth() const;
-  virtual int GetStringWidth(const string16& text) const;
-  virtual int GetExpectedTextWidth(int length) const;
-  virtual int GetStyle() const;
-  virtual std::string GetFontName() const;
-  virtual int GetFontSize() const;
-  virtual NativeFont GetNativeFont() const;
+  virtual Font DeriveFont(int size_delta, int style) const OVERRIDE;
+  virtual int GetHeight() const OVERRIDE;
+  virtual int GetBaseline() const OVERRIDE;
+  virtual int GetAverageCharacterWidth() const OVERRIDE;
+  virtual int GetStringWidth(const string16& text) const OVERRIDE;
+  virtual int GetExpectedTextWidth(int length) const OVERRIDE;
+  virtual int GetStyle() const OVERRIDE;
+  virtual std::string GetFontName() const OVERRIDE;
+  virtual int GetFontSize() const OVERRIDE;
+  virtual NativeFont GetNativeFont() const OVERRIDE;
 
  private:
   PlatformFontMac(const std::string& font_name, int font_size, int style);