Add a function to scroll a platform canvas. This uses the platform scroll...

gfx/skbitmap_operations.h

 // Copyright (c) 2009 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 APP_GFX_SKBITMAP_OPERATIONS_H_
-#define APP_GFX_SKBITMAP_OPERATIONS_H_
+#ifndef GFX_SKBITMAP_OPERATIONS_H_
+#define GFX_SKBITMAP_OPERATIONS_H_
 
 #include "gfx/color_utils.h"
 #include "testing/gtest/include/gtest/gtest_prod.h"
 
 class SkBitmap;
 
 class SkBitmapOperations {
  public:
   // Create a bitmap that is an inverted image of the passed in image.
   // Each color becomes its inverse in the color wheel. So (255, 15, 0) becomes
@@ skipping 57 matching lines @@
   // input size. The normal use of this is to downsample the bitmap "close" to
   // the final size, and then use traditional resampling on the result.
   // Because the bitmap will be closer to the final size, it will be faster,
   // and linear interpolation will generally work well as a second step.
   static SkBitmap DownsampleByTwoUntilSize(const SkBitmap& bitmap,
                                            int min_w, int min_h);
 
   // Makes a bitmap half has large in each direction by averaging groups of
   // 4 pixels. This is one step in generating a mipmap.
   static SkBitmap DownsampleByTwo(const SkBitmap& bitmap);
+
  private:
   SkBitmapOperations();  // Class for scoping only.
 
   FRIEND_TEST(SkBitmapOperationsTest, DownsampleByTwo);
   FRIEND_TEST(SkBitmapOperationsTest, DownsampleByTwoSmall);
 };
 
-#endif  // APP_GFX_SKBITMAP_OPERATIONS_H_
+#endif  // GFX_SKBITMAP_OPERATIONS_H_