Revert IOSurface CoreAnimation simplifications on ccameron@'s advice.

Revert IOSurface CoreAnimation simplifications on ccameron@'s advice.

Contains:

Revert "Workaround to prevent crashes when destroying CGL contexts"
This reverts commit 282049cc52cd09cca07b8bd838f448174c7a87f5.

Revert "Log erros while presenting an IOSurface to about:gpu"
This reverts commit 090e36f056b103946e78aa69ba06de63ae78ccb6.

Revert "Simplify IOSurface CoreAnimation code: Part 2"
This reverts commit 672e23e9a1f1e11cb5f62c46ab8f687e3ca9d3da.
Resolved conflicts:
	content/browser/compositor/io_surface_layer_mac.mm

Fixed call ccameron@ pointed out in: https://codereview.chromium.org/490393002/diff/260001/content/browser/compositor/io_surface_layer_mac.mm#oldcode149

Build fixes for recent scoped_refptr changes.

BUG=314190, 408986, 411782
R=piman@chromium.org
TBR=ccameron@chromium.org,pfeldman@chromium.org

Committed: https://crrev.com/8af59efe5582ea9f1b27fb029f3564523acb866d
Cr-Commit-Position: refs/heads/master@{#296449}

[Ken Russell (switch to Gerrit), 2014-09-24 01:41:32]

kbr@chromium.org changed reviewers:
+ danakj@chromium.org, jbauman@chromium.org, pfeldman@chromium.org,
piman@chromium.org, sievers@chromium.org

[Ken Russell (switch to Gerrit), 2014-09-24 01:41:32]

Reviewers: do any of you want to check my work on this revert prescribed by
ccameron@ in Issue 411782 ?

Tested locally; ran a few pages, the Maps test and the WebGL conformance suite.
Seems to work.

[piman, 2014-09-24 03:23:00]

lgtm

[Ken Russell (switch to Gerrit), 2014-09-24 17:22:19]

Thanks. TBR'ing to pfeldman@ and CQ'ing.

[Ken Russell (switch to Gerrit), 2014-09-24 17:22:23]

The CQ bit was checked by kbr@chromium.org

[commit-bot: I haz the power, 2014-09-24 17:23:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/596703006/1

[commit-bot: I haz the power, 2014-09-24 17:28:26]

Committed patchset #1 (id:1) as ceb4196fdc07a035522f28026239f66b1dcb597d

[commit-bot: I haz the power, 2014-09-24 17:29:24]

Patchset 1 (id:??) landed as
https://crrev.com/8af59efe5582ea9f1b27fb029f3564523acb866d
Cr-Commit-Position: refs/heads/master@{#296449}

[ccameron, 2014-09-24 19:53:47]

lgtm after the fact