Refactor to use GrWrapTextureInBitmap more

include/core/SkImageFilter.h

Index: include/core/SkImageFilter.h
diff --git a/include/core/SkImageFilter.h b/include/core/SkImageFilter.h
index eb5d2a1b062c25ae4e49487036f2a2d5bdc5895b..8153bacb793a8d8c70f10c6f404ad7887af9df3b 100644
--- a/include/core/SkImageFilter.h
+++ b/include/core/SkImageFilter.h
@@ -250,11 +250,6 @@ public:
                                              SkImageFilter* input = NULL);
 
 #if SK_SUPPORT_GPU
-    /**
-     * Wrap the given texture in a texture-backed SkBitmap.
-     */
-    static void WrapTexture(GrTexture* texture, int width, int height, SkBitmap* result);
-
     // Helper function which invokes GPU filter processing on the
     // input at the specified "index". If the input is null, it leaves
     // "result" and "offset" untouched, and returns true. If the input