Revert of gpu: Use shader cache on ES3

Revert of gpu: Use shader cache on ES3 (patchset #2 id:20001 of https://codereview.chromium.org/1223393003/)

Reason for revert:
This codepath is actually flaky.

OnLoadedShader() races with dynamic GL binding initialization. Previously it meant that we just might not end up loading this shader (as long as b_GL_OES_get_program_binary etc. default to false), but the GetGLVersionInfo() might actually crash.

Original issue's description:
> gpu: Use shader cache on ES3
>
> The ES3 core specs supports gl(Get)ProgramBinary().
> BUG=510172
>
> Committed: https://crrev.com/809d9b979c0edd3976132eaaf77fc4740fcee019
> Cr-Commit-Position: refs/heads/master@{#339369}

TBR=dyen@chromium.org,zmo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=510172, 512464
Committed: https://crrev.com/ee93fe24ade72f695c5873b182b0b1774f223b6c
Cr-Commit-Position: refs/heads/master@{#339802}

[no sievers, 2015-07-22 00:46:04]

Created Revert of gpu: Use shader cache on ES3

[no sievers, 2015-07-22 00:46:30]

The CQ bit was unchecked by sievers@chromium.org

[no sievers, 2015-07-22 00:46:30]

The CQ bit was checked by sievers@chromium.org

[no sievers, 2015-07-22 00:46:34]

The CQ bit was checked by sievers@chromium.org

[commit-bot: I haz the power, 2015-07-22 00:47:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1247233002/1

[commit-bot: I haz the power, 2015-07-22 00:50:34]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-07-22 00:51:36]

Patchset 1 (id:??) landed as
https://crrev.com/ee93fe24ade72f695c5873b182b0b1774f223b6c
Cr-Commit-Position: refs/heads/master@{#339802}