Remove GrSurface::isSameAs

src/gpu/GrSurfacePriv.h

Index: src/gpu/GrSurfacePriv.h
diff --git a/src/gpu/GrSurfacePriv.h b/src/gpu/GrSurfacePriv.h
index 3203671fadc4b806a6f9b639f87b46354152519a..3c1e9c1e957e670faa9ab5f795453368ec95155e 100644
--- a/src/gpu/GrSurfacePriv.h
+++ b/src/gpu/GrSurfacePriv.h
@@ -24,13 +24,6 @@ public:
     SkImageInfo info() const { return fSurface->info(); }
 
     /**
-     * Checks whether this GrSurface refers to the same GPU object as other. This
-     * catches the case where a GrTexture and GrRenderTarget refer to the same
-     * GPU memory.
-     */
-    bool isSameAs(const GrSurface* other) const { return fSurface->isSameAs(other); }
-
-    /**
      * Write the contents of the surface to a PNG. Returns true if successful.
      * @param filename      Full path to desired file
      */