Use ScopedRTLFlipCanvas more pervasively for RTL flipping.

ui/views/view.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_VIEWS_VIEW_H_
 #define UI_VIEWS_VIEW_H_
 
 #include <stddef.h>
 
 #include <algorithm>
@@ skipping 520 matching lines @@
     return const_cast<ui::NativeTheme*>(
         const_cast<const View*>(this)->GetNativeTheme());
   }
   const ui::NativeTheme* GetNativeTheme() const;
 
   // RTL painting --------------------------------------------------------------
 
   // This method determines whether the gfx::Canvas object passed to
   // View::Paint() needs to be transformed such that anything drawn on the
   // canvas object during View::Paint() is flipped horizontally.
-  //
-  // By default, this function returns false (which is the initial value of
-  // |flip_canvas_on_paint_for_rtl_ui_|). View subclasses that need to paint on
-  // a flipped gfx::Canvas when the UI layout is right-to-left need to call
-  // EnableCanvasFlippingForRTLUI().
-  bool FlipCanvasOnPaintForRTLUI() const {
-    return flip_canvas_on_paint_for_rtl_ui_ ? base::i18n::IsRTL() : false;
+  bool flip_canvas_on_paint_for_rtl_ui() const {
+    return flip_canvas_on_paint_for_rtl_ui_;
   }
 
   // Enables or disables flipping of the gfx::Canvas during View::Paint().
   // Note that if canvas flipping is enabled, the canvas will be flipped only
   // if the UI layout is right-to-left; that is, the canvas will be flipped
   // only if base::i18n::IsRTL() returns true.
   //
   // Enabling canvas flipping is useful for leaf views that draw an image that
   // needs to be flipped horizontally when the UI layout is right-to-left
   // (views::Button, for example). This method is helpful for such classes
@@ skipping 1011 matching lines @@
   // Belongs to this view, but it's reference-counted on some platforms
   // so we can't use a scoped_ptr. It's dereferenced in the destructor.
   NativeViewAccessibility* native_view_accessibility_;
 
   DISALLOW_COPY_AND_ASSIGN(View);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_VIEW_H_