Remove test of illegal behavior that modifies a texture backing an SkImage.

tests/SurfaceTest.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkData.h"
 #include "SkDevice.h"
@@ skipping 961 matching lines @@
     SkAutoTUnref<SkImage> cpyImg(make_desc_image(ctx, w, h, srcTex, NULL));
 
     test_image_color(reporter, refImg, expected0);
     test_image_color(reporter, cpyImg, expected0);
 
     // Now lets jam new colors into our "external" texture, and see if the images notice
     const SkPMColor expected1 = SkPreMultiplyColor(SK_ColorBLUE);
     sk_memset32(storage, expected1, w * h);
     tex->writePixels(0, 0, w, h, kSkia8888_GrPixelConfig, storage, GrContext::kFlushWrites_PixelOp);
 
-    // We expect the ref'd image to see the new color, but cpy'd one should still see the old color
+    // The cpy'd one should still see the old color
+#if 0
+    // There is no guarantee that refImg sees the new color. We are free to have made a copy. Our
+    // write pixels call violated the contract with refImg and refImg is now undefined.
     test_image_color(reporter, refImg, expected1);
+#endif
     test_image_color(reporter, cpyImg, expected0);
 
     // Now exercise the release proc
     REPORTER_ASSERT(reporter, !releaseCtx.fIsReleased);
     refImg.reset(NULL); // force a release of the image
     REPORTER_ASSERT(reporter, releaseCtx.fIsReleased);
 }
 #endif