Fixing focus highlight on high DPI devices for accessibility

ui/gfx/canvas.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_GFX_CANVAS_H_
 #define UI_GFX_CANVAS_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 391 matching lines @@
                              const Font& font,
                              SkColor color,
                              const Rect& text_bounds,
                              int line_height,
                              int flags,
                              const ShadowValues& shadows);
 
   // Draws a dotted gray rectangle used for focus purposes.
   void DrawFocusRect(const Rect& rect);
 
+  // Draws a |rect| in the specified region with the specified |color| with a
+  // with of one logical pixel which might be more device pixels.
+  void DrawSolidFocusRect(const Rect& rect, SkColor color);
+
   // Tiles the image in the specified region.
   // Parameters are specified relative to current canvas scale not in pixels.
   // Thus, |x| is 2 pixels if canvas scale = 2 & |x| = 1.
   void TileImageInt(const ImageSkia& image,
                     int x,
                     int y,
                     int w,
                     int h);
   void TileImageInt(const ImageSkia& image,
                     int src_x,
@@ skipping 67 matching lines @@
 
   skia::RefPtr<skia::PlatformCanvas> owned_canvas_;
   SkCanvas* canvas_;
 
   DISALLOW_COPY_AND_ASSIGN(Canvas);
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_CANVAS_H_