Revert of Fix TexStorage3D with compressed ETC2/EAC formats

Revert of Fix TexStorage3D with compressed ETC2/EAC formats (patchset #3 id:40001 of https://codereview.chromium.org/1463503002/ )

Reason for revert:
Failing Windows WebGL 2 CTS:

https://build.chromium.org/p/chromium.gpu.fyi/builders/Win7%20Release%20%28NVIDIA%29/builds/19403

WebglConformance.conformance2_textures_misc_tex_storage_compressed_formats:
Failure: getError expected: NO_ERROR. Was INVALID_OPERATION : texStorage3D should succeed for COMPRESSED_R11_EAC
FAIL getError expected: NO_ERROR. Was INVALID_OPERATION : texStorage3D should succeed for COMPRESSED_R11_EAC
getError expected: NO_ERROR. Was INVALID_OPERATION : texStorage3D should succeed for COMPRESSED_SIGNED_R11_EAC
FAIL getError expected: NO_ERROR. Was INVALID_OPERATION : texStorage3D should succeed for COMPRESSED_SIGNED_R11_EAC
getError expected: NO_ERROR. Was INVALID_OPERATION : texStorage3D should succeed for COMPRESSED_RG11_EAC
etc

Original issue's description:
> Fix TexStorage3D with compressed ETC2/EAC formats
>
> These formats don't work for TexStorage3D if target is TEXTURE_3D.
> TEXTURE_2D_ARRAY should work.
>
> BUG=295792
> TEST=conformance2/textures/misc/tex-storage-compressed-formats.html
>
> Committed: https://crrev.com/5b5a54a2d7c287e09f644d04e29718b310949221
> Cr-Commit-Position: refs/heads/master@{#360760}

TBR=kbr@chromium.org,zmo@chromium.org,bajones@chromium.org,qiankun.miao@intel.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=295792
Committed: https://crrev.com/21c9153893f4a238cb65ec353a80ff9483b1d130
Cr-Commit-Position: refs/heads/master@{#360839}

[Jamie Madill, 2015-11-20 16:50:45]

Created Revert of Fix TexStorage3D with compressed ETC2/EAC formats

[commit-bot: I haz the power, 2015-11-20 16:51:05]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1462143003/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1462143003/1

[commit-bot: I haz the power, 2015-11-20 16:52:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-20 16:53:24]

Patchset 1 (id:??) landed as
https://crrev.com/21c9153893f4a238cb65ec353a80ff9483b1d130
Cr-Commit-Position: refs/heads/master@{#360839}