Remove uses of GrAutoScratchTexture.

include/gpu/GrSurface.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrSurface_DEFINED
 #define GrSurface_DEFINED
@@ skipping 87 matching lines @@
      * rectangle.
      * @param left          left edge of the rectangle to write (inclusive)
      * @param top           top edge of the rectangle to write (inclusive)
      * @param width         width of rectangle to write in pixels.
      * @param height        height of rectangle to write in pixels.
      * @param config        the pixel config of the source buffer
      * @param buffer        memory to read the rectangle from.
      * @param rowBytes      number of bytes between consecutive rows. Zero means rows are tightly
      *                      packed.
      * @param pixelOpsFlags See the GrContext::PixelOpsFlags enum.
+     *
+     * @return true if the read succeeded, false if not. The read can fail because of an unsupported
+     *              pixel config.
      */
     bool writePixels(int left, int top, int width, int height,
                      GrPixelConfig config,
                      const void* buffer,
                      size_t rowBytes = 0,
                      uint32_t pixelOpsFlags = 0);
 
     /**
      * After this returns any pending writes to the surface will be issued to the backend 3D API.
      */
@@ skipping 20 matching lines @@
     , fDesc(desc) {
     }
 
     GrTextureDesc fDesc;
 
 private:
     typedef GrGpuResource INHERITED;
 };
 
 #endif