MacViews: Don't draw custom frame on Mac

chrome/browser/ui/views/frame/browser_frame.h

Index: chrome/browser/ui/views/frame/browser_frame.h
diff --git a/chrome/browser/ui/views/frame/browser_frame.h b/chrome/browser/ui/views/frame/browser_frame.h
index 54b90a9804719a4d203ec62eeecbfc051bb2d9cb..502b47b18dc4166b00a3478492b1f55bda887a88 100644
--- a/chrome/browser/ui/views/frame/browser_frame.h
+++ b/chrome/browser/ui/views/frame/browser_frame.h
@@ -7,7 +7,6 @@
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
-#include "base/prefs/pref_member.h"
 #include "build/build_config.h"
 #include "chrome/browser/ui/views/frame/browser_non_client_frame_view.h"
 #include "ui/views/context_menu_controller.h"
@@ -123,9 +122,6 @@ class BrowserFrame
   ui::MenuModel* GetSystemMenuModel();
 
  private:
-  // Called when the preference changes.
-  void OnUseCustomChromeFrameChanged();
-
   NativeBrowserFrame* native_browser_frame_;
 
   // A weak reference to the root view associated with the window. We save a
@@ -152,9 +148,6 @@ class BrowserFrame
   scoped_ptr<ui::ThemeProvider> owned_theme_provider_;
   ui::ThemeProvider* theme_provider_;
 
-  // Whether the custom Chrome frame preference is set.
-  BooleanPrefMember use_custom_frame_pref_;
-
   scoped_ptr<ui::EventHandler> browser_command_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserFrame);