Remove GrTexture::releaseRenderTarget() and add GrSurface::isSameAs().

src/gpu/GrGpu.h

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGpu_DEFINED
@@ skipping 60 matching lines @@
     void unimpl(const char[]);
 
     /**
      * Creates a texture object. If desc width or height is not a power of
      * two but underlying API requires a power of two texture then srcData
      * will be embedded in a power of two texture. The extra width and height
      * is filled as though srcData were rendered clamped into the texture.
      *
      * If kRenderTarget_TextureFlag is specified the GrRenderTarget is
      * accessible via GrTexture::asRenderTarget(). The texture will hold a ref
-     * on the render target until its releaseRenderTarget() is called or it is
-     * destroyed.
+     * on the render target until the texture is destroyed.
      *
      * @param desc        describes the texture to be created.
      * @param srcData     texel data to load texture. Begins with full-size
      *                    palette data for paletted textures. Contains width*
      *                    height texels. If NULL texture data is uninitialized.
      *
      * @return    The texture object if successful, otherwise NULL.
      */
     GrTexture* createTexture(const GrTextureDesc& desc,
                              const void* srcData, size_t rowBytes);
@@ skipping 438 matching lines @@
     // these are mutable so they can be created on-demand
     mutable GrVertexBuffer*                                             fUnitSquareVertexBuffer;
     mutable GrIndexBuffer*                                              fQuadIndexBuffer;
     bool                                                                fContextIsDirty;
     ResourceList                                                        fResourceList;
 
     typedef GrDrawTarget INHERITED;
 };
 
 #endif