Move skia_utils into the skia namespace.

skia/ext/skia_utils.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_SKIA_UTILS_H_
 #define BASE_GFX_SKIA_UTILS_H_
 
 #include "SkColor.h"
 #include "SkShader.h"
 
-namespace gfx {
+namespace skia {
 
 // Creates a vertical gradient shader. The caller owns the shader.
 // Example usage to avoid leaks:
 //   paint.setShader(gfx::CreateGradientShader(0, 10, red, blue))->safeUnref();
 //
 // (The old shader in the paint, if any, needs to be freed, and safeUnref will
 // handle the NULL case.)
 SkShader* CreateGradientShader(int start_point,
                                int end_point,
                                SkColor start_color,
                                SkColor end_color);
 
-}  // namespace gfx
+}  // namespace skia
 
 #endif  // SKIA_EXT_SKIA_UTILS_H_