Revert of gpu: workaround force_cube_map_positive_x_allocation fixes Android crash.

Revert of gpu: workaround force_cube_map_positive_x_allocation fixes Android crash. (patchset #10 id:180001 of https://codereview.chromium.org/1280163004/ )

Reason for revert:
Causing failures on the Linux AMD GPU FYI bot.

[ RUN      ] GLCubeMapTextureTests/GLCubeMapTextureTest.ReadPixelsFromIncompleteFBO/5
Received signal 11 SEGV_MAPERR 000000000058
#0 0x000000486a35 base::debug::(anonymous namespace)::StackDumpSignalHandler()
#1 0x7fe9b624ecb0 <unknown>
#2 0x7fe9b31f6b9e <unknown>
#3 0x7fe9b3209948 <unknown>
#4 0x7fe9b31d9d02 <unknown>
#5 0x7fe9b31d426e <unknown>
#6 0x7fe9b2fec29b <unknown>
#7 0x7fe9b268badd <unknown>
#8 0x0000005138c6 gpu::gles2::Framebuffer::GetStatus()
#9 0x000000537936 gpu::gles2::GLES2DecoderImpl::CheckFramebufferValid()

Original issue's description:
> gpu: workaround force_cube_map_positive_x_allocation fixes Android crash.
>
> Adreno Android (e.g. Nexus5) crashes on allocating a cube map texture bound to FBO, if
> the CUBE_MAP_POSITIVE_X texture is not allocated yet. The Workaround forces to allocate
> the CUBE_MAP_POSITIVE_X texture.
>
> Add new unittests to prevent regression. ANGLE crashes on GLCubeMapTextureTest.ReadPixels
> It's will be fixed in ANGLE project.
>
> TEST=gl_tests.GLCubeMapTextureTests.*
> BUG=518889
>
> Committed: https://crrev.com/1eebeac3e05c2035139c04226b34cef745cfd822
> Cr-Commit-Position: refs/heads/master@{#343600}

TBR=piman@chromium.org,zmo@google.com,kbr@chromium.org,sievers@chromium.org,dongseong.hwang@intel.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=518889
Committed: https://crrev.com/a814ea088d8c8f85485b3588996605767081cd79
Cr-Commit-Position: refs/heads/master@{#343676}

[Jamie Madill, 2015-08-17 14:20:28]

Created Revert of gpu: workaround force_cube_map_positive_x_allocation fixes
Android crash.

[commit-bot: I haz the power, 2015-08-17 14:20:32]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1293123002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1293123002/1

[commit-bot: I haz the power, 2015-08-17 14:20:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-17 14:21:48]

Patchset 1 (id:??) landed as
https://crrev.com/a814ea088d8c8f85485b3588996605767081cd79
Cr-Commit-Position: refs/heads/master@{#343676}

[dshwang, 2015-08-17 14:58:15]

On 2015/08/17 14:20:28, Jamie Madill wrote:
> Created Revert of gpu: workaround force_cube_map_positive_x_allocation fixes
> Android crash.

Thank you for reverting it. Surprisingly ATI has similar crash bug to Android.
Let me workaround ATI also.