Fix SkCanvas::wouldOverwriteEntireSurface() contains test

Fix SkCanvas::wouldOverwriteEntireSurface() contains test

R=reed@google.com,robertphillips@google.com,bsalomon@google.com

Committed: https://skia.googlesource.com/skia/+/8c0144ccb17220db9d5140ef5ee85d5bc7837513

[f(malita), 2015-07-21 21:36:01]

The CQ bit was checked by fmalita@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-07-21 21:36:14]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1244093005/1

[f(malita), 2015-07-21 21:42:19]

Lots of fun debugging Blink/C2D over this one :)

[commit-bot: I haz the power, 2015-07-21 21:55:37]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-07-21 21:55:38]

Dry run: This issue passed the CQ dry run.

[f(malita), 2015-07-21 22:40:31]

The CQ bit was checked by fmalita@chromium.org

[commit-bot: I haz the power, 2015-07-21 22:40:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1244093005/1

[commit-bot: I haz the power, 2015-07-21 22:40:40]

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 valid reviewer(s) till 2015-07-22 04:40 UTC

[commit-bot: I haz the power, 2015-07-22 04:40:05]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-07-22 04:40:06]

No LGTM from a valid reviewer yet. Please ask for an LGTM from a
full Skia committer from
https://skia.googlesource.com/skia/+/master/CQ_COMMITTERS

[robertphillips, 2015-07-22 12:34:23]

lgtm + doc request

https://codereview.chromium.org/1244093005/diff/1/tests/ImageTest.cpp
File tests/ImageTest.cpp (right):

https://codereview.chromium.org/1244093005/diff/1/tests/ImageTest.cpp#newcode133
tests/ImageTest.cpp:133: 
// Test that a draw that only partially covers the drawing surface isn't
interpreted as covering the entire drawing surface (i.e., exercise one of the
conditions of SkCanvas::wouldOverwriteEntireSurface()).
?

[f(malita), 2015-07-22 12:49:16]

The CQ bit was checked by fmalita@chromium.org

[f(malita), 2015-07-22 12:49:17]

The patchset sent to the CQ was uploaded after l-g-t-m from
robertphillips@google.com
Link to the patchset: https://codereview.chromium.org/1244093005/#ps20001
(title: "test comment")

[commit-bot: I haz the power, 2015-07-22 12:49:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1244093005/20001

[f(malita), 2015-07-22 12:49:58]

https://codereview.chromium.org/1244093005/diff/1/tests/ImageTest.cpp
File tests/ImageTest.cpp (right):

https://codereview.chromium.org/1244093005/diff/1/tests/ImageTest.cpp#newcode133
tests/ImageTest.cpp:133: 
On 2015/07/22 12:34:23, robertphillips wrote:
> // Test that a draw that only partially covers the drawing surface isn't
> interpreted as covering the entire drawing surface (i.e., exercise one of the
> conditions of SkCanvas::wouldOverwriteEntireSurface()).
> ?

Done.

[commit-bot: I haz the power, 2015-07-22 12:56:20]

Committed patchset #2 (id:20001) as
https://skia.googlesource.com/skia/+/8c0144ccb17220db9d5140ef5ee85d5bc7837513