cc: Do not save the rasterScale for layers until they are finished animating transforms.

cc: Do not save the rasterScale for layers until they are finished animating transforms.

Currently we save the rasterScale for a layer the first time we see it. However,
if the layer is animating, the value we save isn't very accurate. Instead, avoid
saving the value until the animation is complete.

Tests:
cc_unittests:LayerTreeHostCommonTest.verifyContentsScaleForAnimatingLayer

R=enne
BUG=159937
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=166660

[enne (OOO), 2012-11-08 02:37:27]

lgtm

[commit-bot: I haz the power, 2012-11-08 02:51:34]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/danakj@chromium.org/11362151/1

[commit-bot: I haz the power, 2012-11-08 11:39:13]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/danakj@chromium.org/11362151/1

[commit-bot: I haz the power, 2012-11-08 11:53:28]

Change committed as 166660