cc: Make HeadsUpDisplayLayer no longer a ContentsScalingLayer

cc: Make HeadsUpDisplayLayer no longer a ContentsScalingLayer

The HUD layer can just get its scale from the compositor thread rather
than the main thread.  This change makes it possible to remove content
scale calculations off of the main thread once TiledLayer is removed.

Committed: https://crrev.com/73f6bd0f123b64ccd4f98d7fca237bbeb4604c83
Cr-Commit-Position: refs/heads/master@{#316248}

[enne (OOO), 2015-02-11 23:41:06]

enne@chromium.org changed reviewers:
+ danakj@chromium.org

[enne (OOO), 2015-02-11 23:41:35]

Depends on https://codereview.chromium.org/913133004

[danakj, 2015-02-11 23:47:48]

LGTM

https://codereview.chromium.org/913243003/diff/1/cc/layers/heads_up_display_l...
File cc/layers/heads_up_display_layer_impl.cc (right):

https://codereview.chromium.org/913243003/diff/1/cc/layers/heads_up_display_l...
cc/layers/heads_up_display_layer_impl.cc:129: internal_content_scale_ =
draw_properties().ideal_contents_scale;
nit: internal_contents_scale_ for inconsistent consistency? idk. /o\

[enne (OOO), 2015-02-12 00:02:44]

New patchsets have been uploaded after l-g-t-m from danakj@chromium.org

[enne (OOO), 2015-02-12 00:03:04]

https://codereview.chromium.org/913243003/diff/1/cc/layers/heads_up_display_l...
File cc/layers/heads_up_display_layer_impl.cc (right):

https://codereview.chromium.org/913243003/diff/1/cc/layers/heads_up_display_l...
cc/layers/heads_up_display_layer_impl.cc:129: internal_content_scale_ =
draw_properties().ideal_contents_scale;
On 2015/02/11 23:47:47, danakj wrote:
> nit: internal_contents_scale_ for inconsistent consistency? idk. /o\

Done.

[enne (OOO), 2015-02-13 17:45:24]

The CQ bit was checked by enne@chromium.org

[commit-bot: I haz the power, 2015-02-13 17:46:36]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/913243003/20001

[commit-bot: I haz the power, 2015-02-13 18:56:10]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2015-02-13 18:56:50]

Patchset 2 (id:??) landed as
https://crrev.com/73f6bd0f123b64ccd4f98d7fca237bbeb4604c83
Cr-Commit-Position: refs/heads/master@{#316248}