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

include/core/SkImage.h

Index: include/core/SkImage.h
diff --git a/include/core/SkImage.h b/include/core/SkImage.h
index 61529cc71d50ec88bb621366ff02b8a85ec24761..e2757b9af5cad8d2e2ac1cdf3173a2aeb31a1578 100644
--- a/include/core/SkImage.h
+++ b/include/core/SkImage.h
@@ -74,6 +74,15 @@ public:
                                    SkAlphaType = kPremul_SkAlphaType);
 
     /**
+     *  Create a new image from the specified descriptor. Note - Skia will delete or recycle the
+     *  texture when the image is released.
+     *
+     *  Will return NULL if the specified descriptor is unsupported.
+     */
+    static SkImage* NewFromAdoptedTexture(GrContext*, const GrBackendTextureDesc&,
+                                          SkAlphaType = kPremul_SkAlphaType);
+
+    /**
      *  Create a new image by copying the pixels from the specified descriptor. No reference is
      *  kept to the original platform texture.
      *