Add OVERRIDE to ui/.

ui/gfx/platform_font_pango.h

Index: ui/gfx/platform_font_pango.h
diff --git a/ui/gfx/platform_font_pango.h b/ui/gfx/platform_font_pango.h
index 2e4ccdd3b50473a3543eccf940d7bfc8e68359df..7f8193946c349acb8e89a6146c262ce2e094dcf1 100644
--- a/ui/gfx/platform_font_pango.h
+++ b/ui/gfx/platform_font_pango.h
@@ -6,6 +6,7 @@
 #define UI_GFX_PLATFORM_FONT_PANGO_H_
 #pragma once
 
+#include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "third_party/skia/include/core/SkRefCnt.h"
 #include "ui/gfx/platform_font.h"
@@ -39,16 +40,16 @@ class UI_EXPORT PlatformFontPango : public PlatformFont {
   double underline_thickness() const;
 
   // 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:
   // Create a new instance of this object with the specified properties. Called