Propogate the clip rect for visible_content_rect into surfaces.

Propogate the clip rect for visible_content_rect into surfaces.

Currently each render surface takes as its clip rect for visible content
rects as the clip rect directly clipping its own surface, but drops the
clip for visible content rects from outside the surface.

This means that the viewport does not clip the visible_content_rect of
any layers that aren't in the root surface. Fixed by intersecting this
clip for visible content rects with the one from outside the surface.

BUG=410625
Committed: https://crrev.com/f6069db89203f0797e4429c47ae268901c69a299
Cr-Commit-Position: refs/heads/master@{#294706}

[danakj, 2014-09-12 21:07:10]

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

[danakj, 2014-09-12 21:57:40]

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

[danakj, 2014-09-12 21:57:40]

or +vollick in case he's able to get to this

[Ian Vollick, 2014-09-12 22:08:30]

On 2014/09/12 21:57:40, danakj wrote:
> or +vollick in case he's able to get to this

lgtm!

[Ian Vollick, 2014-09-12 22:08:33]

The CQ bit was checked by vollick@chromium.org

[danakj, 2014-09-12 22:08:35]

The CQ bit was checked by danakj@chromium.org

[commit-bot: I haz the power, 2014-09-12 22:09:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patchset/565353002/20001

[commit-bot: I haz the power, 2014-09-13 00:48:48]

Committed patchset #2 (id:20001) as 9ecddf9305cf7e52a7edd09dff387dafaa2b18ed

[commit-bot: I haz the power, 2014-09-13 00:54:41]

Patchset 2 (id:??) landed as
https://crrev.com/f6069db89203f0797e4429c47ae268901c69a299
Cr-Commit-Position: refs/heads/master@{#294706}