Revert of cc: Make scheduling be driven by vsync for android webview. (patchset ...

Revert of cc: Make scheduling be driven by vsync for android webview. (patchset #38 id:740001 of https://codereview.chromium.org/817603002/)

Reason for revert:
Causes a webview test to fail.
http://build.chromium.org/p/chromium.linux/builders/Android%20Tests/builds/19230

Original issue's description:
> cc: Make scheduling be driven by vsync for android webview.
>
> This CL makes android webview use the similar mechanisms for
> scheduling as other platforms instead of using special
> polling code in the scheduler.
>
> Design Doc: https://docs.google.com/a/chromium.org/document/d/1w5UiuA2uZcAiU9-1Y23bxXaStUThkAK8wHI4ULqho2Y/edit#
>
> BUG=439275
>
> Committed: https://crrev.com/bf27da634790bb6eecf4b89f278cfd55c5e5d1f3
> Cr-Commit-Position: refs/heads/master@{#323361}

TBR=brianderson@chromium.org,boliu@chromium.org,enne@chromium.org,danakj@chromium.org,hush@chromium.org,mithro@mithis.com,jdduke@chromium.org,sievers@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=439275

Review URL: https://codereview.chromium.org/1055743002

Cr-Commit-Position: refs/heads/master@{#323415}