Add 1px black border for ChromeOS status button.

gfx/canvas_skia.h

 // Copyright (c) 2010 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 GFX_CANVAS_SKIA_H_
 #define GFX_CANVAS_SKIA_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "gfx/canvas.h"
@@ skipping 49 matching lines @@
   //
   // This function returns either gfx::Canvas::TEXT_ALIGN_LEFT or
   // gfx::Canvas::TEXT_ALIGN_RIGHT.
   static int DefaultCanvasTextAlignment();
 
 #if defined(OS_POSIX) && !defined(OS_MACOSX)
   // Draw the pixbuf in its natural size at (x, y).
   void DrawGdkPixbuf(GdkPixbuf* pixbuf, int x, int y);
 #endif
 
-#ifdef OS_WIN  // Only implemented on Windows for now.
-  // Draws text with a 1-pixel halo around it of the given color. It allows
-  // ClearType to be drawn to an otherwise transparenct bitmap for drag images.
-  // Drag images have only 1-bit of transparency, so we don't do any fancy
-  // blurring.
+#if defined(OS_WIN) || (defined(OS_POSIX) && !defined(OS_MACOSX))
+  // Draws text with a 1-pixel halo around it of the given color.
+  // On Windows, it allows ClearType to be drawn to an otherwise transparenct
+  //   bitmap for drag images. Drag images have only 1-bit of transparency, so
+  //   we don't do any fancy blurring.
+  // On Linux, text with halo is created by stroking it with 2px |halo_color|
+  //   then filling it with |text_color|.
   void DrawStringWithHalo(const std::wstring& text,
                           const gfx::Font& font,
                           const SkColor& text_color,
                           const SkColor& halo_color,
                           int x, int y, int w, int h,
                           int flags);
 #endif
 
   // Extracts a bitmap from the contents of this canvas.
   SkBitmap ExtractBitmap() const;
@@ skipping 66 matching lines @@
                      int x, int y, int w, int h,
                      int flags);
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(CanvasSkia);
 };
 
 }  // namespace gfx;
 
 #endif  // GFX_CANVAS_SKIA_H_