Revert of cc: Adding DidFinishImplFrame to LTHI.

Revert of cc: Adding DidFinishImplFrame to LTHI. (patchset #10 id:180001 of https://codereview.chromium.org/1111743002/)

Reason for revert:
Broke Win x64 GN build.

http://build.chromium.org/p/chromium.win/builders/Win%20x64%20GN/builds/1013/steps/compile/logs/stdio

Original issue's description:
> cc: Adding DidFinishImplFrame to LTHI.
>
> This change moves the responsibility of clearing state inside the LTHI after an
> impl frame is finished from the thread proxies to the LTHI class. This makes
> WillBeginImplFrame and DidFinishImplFrame a logical pair.
>
> This CL also;
>  * Adds a test that checks the number of WillBeginImplFrame
>    calls matches the DidFinishImplFrame calls.
>  * Cleans up classes in cc/test/layer_tree_test.h around WillBeginImplFrame.
>  * Removes the UpdateCurrentBeginFrameArgs / ResetCurrentBeginFrameArgs methods.
>  * Fixes a bug where STP was calling ResetCurrentBeginFrameArgs twice every frame.
>
> BUG=346230, 481810
> R=brianderson,enne
>
> Committed: https://crrev.com/2caee4f89de17858822c11379da9c6cd80f90708
> Cr-Commit-Position: refs/heads/master@{#328689}

TBR=brianderson@chromium.org,enne@chromium.org,danakj@chromium.org,sunnyps@chromium.org,mithro@mithis.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=346230, 481810
Committed: https://crrev.com/4279b872d0187987853fb1f9283486be50efe26a
Cr-Commit-Position: refs/heads/master@{#328692}

[Kunihiko Sakamoto, 2015-05-07 03:30:49]

Created Revert of cc: Adding DidFinishImplFrame to LTHI.

[commit-bot: I haz the power, 2015-05-07 03:31:04]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1127963003/1

[commit-bot: I haz the power, 2015-05-07 03:36:41]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-07 03:37:44]

Patchset 1 (id:??) landed as
https://crrev.com/4279b872d0187987853fb1f9283486be50efe26a
Cr-Commit-Position: refs/heads/master@{#328692}