Fix a proto-type mismatch on a virtual override.

src/base/gfx/platform_canvas_linux.h

 // Copyright (c) 2006-2008 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 BASE_GFX_PLATFORM_CANVAS_LINUX_H_
 #define BASE_GFX_PLATFORM_CANVAS_LINUX_H_
 
 #include "base/gfx/platform_device_linux.h"
 #include "base/basictypes.h"
 
@@ skipping 19 matching lines @@
   // Returns the platform device pointer of the topmost rect with a non-empty
   // clip. Both the windows and mac versions have an equivalent of this method;
   // a Linux version is added for compatibility.
   PlatformDeviceLinux& getTopPlatformDevice() const;
 
  protected:
   // Creates a device store for use by the canvas. We override this so that
   // the device is always our own so we know that we can use GDI operations
   // on it. Simply calls into createPlatformDevice().
   virtual SkDevice* createDevice(SkBitmap::Config, int width, int height,
-                                 bool is_opaque);
+                                 bool is_opaque, bool isForLayer);
 
   // Creates a device store for use by the canvas. By default, it creates a
   // BitmapPlatformDevice object. Can be overridden to change the object type.
   virtual SkDevice* createPlatformDevice(int width, int height, bool is_opaque);
 
   DISALLOW_COPY_AND_ASSIGN(PlatformCanvasLinux);
 };
 
 }  // namespace gfx
 
 #endif  // BASE_GFX_PLATFORM_CANVAS_MAC_H_