Add support for creating texture backed images where Skia will delete the texture.

include/gpu/GrTextureProvider.h

Index: include/gpu/GrTextureProvider.h
diff --git a/include/gpu/GrTextureProvider.h b/include/gpu/GrTextureProvider.h
index 3f8c760f9b8c3b29343b8dba324143d1d04942da..1e4283bd5c0453406ef28591900133174fb4d794 100644
--- a/include/gpu/GrTextureProvider.h
+++ b/include/gpu/GrTextureProvider.h
@@ -106,11 +106,9 @@ public:
      * OpenGL: if the object is a texture Gr may change its GL texture params
      *         when it is drawn.
      *
-     * @param  desc     description of the object to create.
-     *
      * @return GrTexture object or NULL on failure.
      */
-    GrTexture* wrapBackendTexture(const GrBackendTextureDesc& desc);
+    GrTexture* wrapBackendTexture(const GrBackendTextureDesc& desc, GrWrapOwnership);
 
     /**
      * Wraps an existing render target with a GrRenderTarget object. It is
@@ -118,11 +116,10 @@ public:
      * that are not also textures (e.g. FBO 0 in OpenGL, or an MSAA buffer that
      * the client will resolve to a texture).
      *
-     * @param  desc     description of the object to create.
-     *
      * @return GrTexture object or NULL on failure.
      */
-     GrRenderTarget* wrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc);
+     GrRenderTarget* wrapBackendRenderTarget(const GrBackendRenderTargetDesc& desc,
+                                             GrWrapOwnership);
 
 protected:
     GrTextureProvider(GrGpu* gpu, GrResourceCache* cache) : fCache(cache), fGpu(gpu) {}