Use proper namespace in skia/ext

skia/ext/skia_utils_ios.h

 // Copyright 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 SKIA_EXT_SKIA_UTILS_IOS_H_
 #define SKIA_EXT_SKIA_UTILS_IOS_H_
 
 #include <CoreGraphics/CoreGraphics.h>
 #include <vector>
 
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkColor.h"
 
 #ifdef __OBJC__
 @class UIColor;
 @class UIImage;
 @class NSData;
 #else
 class UIColor;
 class UIImage;
 class NSData;
 #endif
 
-namespace gfx {
+namespace skia {
 
 // Draws a CGImage into an SkBitmap of the given size.
 SK_API SkBitmap CGImageToSkBitmap(CGImageRef image,
                                   CGSize size,
                                   bool is_opaque);
 
 // Given an SkBitmap and a color space, return an autoreleased UIImage.
 SK_API UIImage* SkBitmapToUIImageWithColorSpace(const SkBitmap& skia_bitmap,
                                                 CGFloat scale,
                                                 CGColorSpaceRef color_space);
 
 // Decodes all image representations inside the data into a vector of SkBitmaps.
 // Returns a vector of all the successfully decoded representations or an empty
 // vector if none can be decoded.
 SK_API std::vector<SkBitmap> ImageDataToSkBitmaps(NSData* image_data);
 
 // Returns a UIColor for an SKColor. Used by iOS downstream.
 SK_API UIColor* UIColorFromSkColor(SkColor color);
 
-}  // namespace gfx
+}  // namespace skia
 
 #endif  // SKIA_EXT_SKIA_UTILS_IOS_H_