Improve some naming

ui/base/theme_provider.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 UI_BASE_THEME_PROVIDER_H_
 #define UI_BASE_THEME_PROVIDER_H_
 
 #include "base/basictypes.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/base/layout.h"
@@ skipping 29 matching lines @@
 //
 //   ThemeProvider is an abstract class that defines the API that should be
 //   implemented to provide bitmaps and color information for a given theme.
 //
 ////////////////////////////////////////////////////////////////////////////////
 
 class UI_BASE_EXPORT ThemeProvider {
  public:
   virtual ~ThemeProvider();
 
-  // Whether we're using the native theme (which may or may not be the
+  // Whether we're using the system theme (which may or may not be the
   // same as the default theme).
-  virtual bool UsingNativeTheme() const = 0;
+  virtual bool UsingSystemTheme() const = 0;
 
   // Get the image specified by |id|. An implementation of ThemeProvider should
   // have its own source of ids (e.g. an enum, or external resource bundle).
   virtual gfx::ImageSkia* GetImageSkiaNamed(int id) const = 0;
 
   // Get the color specified by |id|.
   virtual SkColor GetColor(int id) const = 0;
 
   // Get the property (e.g. an alignment expressed in an enum, or a width or
   // height) specified by |id|.
@@ skipping 29 matching lines @@
   virtual NSColor* GetNSColorTint(int id) const = 0;
 
   // Gets the NSGradient with the specified |id|.
   virtual NSGradient* GetNSGradient(int id) const = 0;
 #endif
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_THEME_PROVIDER_H_