Replacing the OVERRIDE with override in chrome/common

chrome/common/extensions/manifest_handlers/theme_handler.h

Index: chrome/common/extensions/manifest_handlers/theme_handler.h
diff --git a/chrome/common/extensions/manifest_handlers/theme_handler.h b/chrome/common/extensions/manifest_handlers/theme_handler.h
index 2a36e8ee6e3874b9b205291ca1446212e0d396ba..26d613c00e67362c6312ed4b1ea2a3e3c7e1a704 100644
--- a/chrome/common/extensions/manifest_handlers/theme_handler.h
+++ b/chrome/common/extensions/manifest_handlers/theme_handler.h
@@ -45,13 +45,13 @@ class ThemeHandler : public ManifestHandler {
   ThemeHandler();
   virtual ~ThemeHandler();
 
-  virtual bool Parse(Extension* extension, base::string16* error) OVERRIDE;
+  virtual bool Parse(Extension* extension, base::string16* error) override;
   virtual bool Validate(const Extension* extension,
                         std::string* error,
-                        std::vector<InstallWarning>* warnings) const OVERRIDE;
+                        std::vector<InstallWarning>* warnings) const override;
 
  private:
-  virtual const std::vector<std::string> Keys() const OVERRIDE;
+  virtual const std::vector<std::string> Keys() const override;
 
   DISALLOW_COPY_AND_ASSIGN(ThemeHandler);
 };