Improve some naming

chrome/browser/themes/theme_service.h

Index: chrome/browser/themes/theme_service.h
diff --git a/chrome/browser/themes/theme_service.h b/chrome/browser/themes/theme_service.h
index ea4a2762f775810e6945f539d19464909d3a8e0c..87f8c33b5a5b69cac00026afd69b2e40180e6bc4 100644
--- a/chrome/browser/themes/theme_service.h
+++ b/chrome/browser/themes/theme_service.h
@@ -76,7 +76,7 @@ class ThemeService : public base::NonThreadSafe,
   virtual gfx::Image GetImageNamed(int id) const;
 
   // Overridden from ui::ThemeProvider:
-  virtual bool UsingNativeTheme() const OVERRIDE;
+  virtual bool UsingSystemTheme() const OVERRIDE;
   virtual gfx::ImageSkia* GetImageSkiaNamed(int id) const OVERRIDE;
   virtual SkColor GetColor(int id) const OVERRIDE;
   virtual int GetDisplayProperty(int id) const OVERRIDE;
@@ -106,9 +106,9 @@ class ThemeService : public base::NonThreadSafe,
   // Reset the theme to default.
   virtual void UseDefaultTheme();
 
-  // Set the current theme to the native theme. On some platforms, the native
+  // Set the current theme to the system theme. On some platforms, the system
   // theme is the default theme.
-  virtual void SetNativeTheme();
+  virtual void UseSystemTheme();
 
   // Whether we're using the chrome default theme. Virtual so linux can check
   // if we're using the GTK theme.