fix Image::isOpaque test to not leak

fix Image::isOpaque test to not leak

BUG=skia:

Committed: https://skia.googlesource.com/skia/+/b88813683cb1242ee5d0b6d8f5deb50b39e81e7f

[reed1, 2014-08-20 13:59:41]

The CQ bit was checked by reed@google.com

[commit-bot: I haz the power, 2014-08-20 14:00:10]

CQ is trying da patch. Follow status at
 https://skia-tree-status.appspot.com/cq/reed@google.com/495523002/1

[commit-bot: I haz the power, 2014-08-20 14:00:11]

Note for Reviewers:
The CQ is waiting for an approval.
If you believe that the CL is not ready yet, or if you would like to L-G-T-M
with comments then please uncheck the CQ checkbox.

Waiting for LGTM from a valid reviewer till 2014-08-20 20:00 UTC

[robertphillips, 2014-08-20 14:21:49]

lgtm + a trackability suggestion

https://codereview.chromium.org/495523002/diff/1/tests/ImageIsOpaqueTest.cpp
File tests/ImageIsOpaqueTest.cpp (right):

https://codereview.chromium.org/495523002/diff/1/tests/ImageIsOpaqueTest.cpp#...
tests/ImageIsOpaqueTest.cpp:53: SkAutoTUnref<SkSurface>
surfaceOpaque(SkSurface::NewRenderTarget(context, infoOpaque));
Create an issue and add the # here ?

[commit-bot: I haz the power, 2014-08-20 14:24:15]

Committed patchset #1 (1) as b88813683cb1242ee5d0b6d8f5deb50b39e81e7f