cc: Add a pixel test for background blur outsets.

cc: Add remaining pixel tests for background blur.

This replicates the following layout tests with compositor pixel tests:
platform/chromium/compositing/filters/background-filter-blur-outsets.html
platform/chromium/compositing/filters/background-filter-blur-off-axis.html

The first test verifies that pixels from outside the bounds of the layer
with background blur are used to contribute to the background behind the
blurred layer.

The second test verifies that the blur layer's transform does not affect
the rendering of the blurred content behind it.

New test:
LayerTreeHostFiltersPixelTest.BackgroundFilterBlurOutsets
LayerTreeHostFiltersPixelTest.BackgroundFilterBlurOffAxis

R=jamesr,enne
BUG=191170
Depends on: https://codereview.chromium.org/12518026/


Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=191494

[danakj, 2013-03-14 03:22:34]

Added the off-axis test as well.

[danakj, 2013-03-14 18:35:10]

Here's the pixels for these:
http://imgur.com/TUcoUNy
http://imgur.com/w0MttNK

[jamesr, 2013-03-14 20:40:23]

lgtm

[commit-bot: I haz the power, 2013-03-15 17:55:38]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/danakj@chromium.org/12571010/9001

[commit-bot: I haz the power, 2013-03-15 18:19:39]

Sorry for I got bad news for ya.
Compile failed with a clobber build on linux_chromeos_clang.
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_chro...
Your code is likely broken or HEAD is junk. Please ensure your
code is not broken then alert the build sheriffs.
Look at the try server FAQ for more details.

[commit-bot: I haz the power, 2013-03-15 18:24:17]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/danakj@chromium.org/12571010/29001

[commit-bot: I haz the power, 2013-03-15 18:49:16]

Retried try job too often on win for step(s) compile
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win&number...

[commit-bot: I haz the power, 2013-03-15 18:50:58]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/danakj@chromium.org/12571010/29001

[danakj, 2013-03-16 00:31:47]

Committed patchset #4 manually as r188524 (presubmit successful).

[danakj, 2013-03-16 01:02:13]

Argh, reverted this. The trybots apparently skipped cc_unittests for mac and win
and we get different pixel results on those platforms :(:(:(:(:(.

On Win7 debug:
[ RUN      ] LayerTreeHostFiltersPixelTest.BackgroundFilterBlurOffAxis
[21668:21692:0315/175727:784513:ERROR:pixel_test_utils.cc(71)] Images differ by
pixel count: 4
test\layer_tree_pixel_test.cc(71): error: Value of: IsSameAsPNGFile(bitmap,
test_data_dir.Append(ref_file_))
  Actual: false
Expected: true

On Mac106 release:
[ RUN      ] LayerTreeHostFiltersPixelTest.BackgroundFilterBlurOutsets
[3586:12807:0315/175647:320958272769:ERROR:pixel_test_utils.cc(71)] Images
differ by pixel count: 700
/Volumes/data/b/build/slave/cr-mac-rel/build/src/cc/test/layer_tree_pixel_test.cc:71:
Failure
Value of: IsSameAsPNGFile(bitmap, test_data_dir.Append(ref_file_))
  Actual: false
Expected: true

[danakj, 2013-03-16 01:09:27]

Mac 10.6 & 10.7 release both fail BackgroundFilterBlurOutsets:
http://build.chromium.org/p/chromium.mac/buildstatus?builder=Mac10.6%20Tests%...
http://build.chromium.org/p/chromium.mac/buildstatus?builder=Mac10.7%20Tests%...

Mac 10.6 & 10.7 debug both passed:
http://build.chromium.org/p/chromium.mac/buildstatus?builder=Mac%2010.6%20Tes...
http://build.chromium.org/p/chromium.mac/buildstatus?builder=Mac%2010.7%20Tes...

I guess I'll be building on mac to see what's going on.

[danakj, 2013-03-16 01:12:23]

And Win7 debug and Win7 release x64 behave identically, both fail
BackgroundFilterBlurOffAxis on 4 pixels.
http://build.chromium.org/p/chromium.win/buildstatus?builder=Win%207%20Tests%...
http://build.chromium.org/p/chromium.win/buildstatus?builder=Win7%20Tests%20%...

[danakj, 2013-03-26 22:31:09]

Yay now everything passes except 4 pixels in the BlurOffAxis test on
win/win_rel.

[commit-bot: I haz the power, 2013-03-29 21:12:27]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/danakj@chromium.org/12571010/98001

[commit-bot: I haz the power, 2013-03-30 02:59:57]

Retried try job too often on win_rel for step(s) browser_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=win_rel&nu...

[commit-bot: I haz the power, 2013-03-30 03:24:46]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/danakj@chromium.org/12571010/98001

[commit-bot: I haz the power, 2013-03-30 06:44:51]

Change committed as 191494