Add helper for creating a SkSurface from a client created texture.

include/core/SkSurface.h

Index: include/core/SkSurface.h
diff --git a/include/core/SkSurface.h b/include/core/SkSurface.h
index a87eccefdc9ee88796212ffa36072205538fe1e9..cc0dda4db5da0a9cfefb8e9f73ac661c2c802b31 100644
--- a/include/core/SkSurface.h
+++ b/include/core/SkSurface.h
@@ -93,6 +93,11 @@ public:
     static SkSurface* NewRenderTargetDirect(GrRenderTarget* target) {
         return NewRenderTargetDirect(target, NULL);
     }
+
+    /** Used to wrap a pre-existing backend 3D API texture in a SkSurface. The kRenderTarget flag

[reed1, 2015/04/08 15:09:41]

nit: comment style...
/**
 *
 */

[bsalomon, 2015/04/08 15:14:17]

Done.

+        must be set on GrBackendTextureDesc for this to succeed. */
+    static SkSurface* NewWrappedRenderTarget(GrContext*, GrBackendTextureDesc,
+                                             const SkSurfaceProps*);
     
     /**
      *  Return a new surface whose contents will be drawn to an offscreen