Revert of webgl: use immutable texture for the default FBO.

Revert of webgl: use immutable texture for the default FBO. (patchset #2 id:20001 of https://codereview.chromium.org/1449043005/ )

Reason for revert:
https://bugs.chromium.org/p/chromium/issues/detail?id=626742

BUG=626742
Original issue's description:
> webgl: use immutable texture for the default FBO.
> 
> Use immutable texture for the default FBO like chromium compositor.
> 
> In theory, it speeds up drawing speed, because immutable texture skips texture
> validation on drawing call.
> 
> In addition, immutable texture allows GL_INTEL_framebuffer_CMAA more optimization.
> 
> BUG=557848
> TEST=
> WebglConformance.conformance_renderbuffers_framebuffer_state_restoration
> WebglConformance.conformance_textures_misc_texture_size_cube_maps
> WebglConformance.conformance_textures_misc_texture_sub_image_cube_maps
> WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgb_rgb_unsigned_byte
> WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgb_rgb_unsigned_short_5_6_5
> WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgba_rgba_unsigned_byte
> WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgba_rgba_unsigned_short_4_4_4_4
> WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgba_rgba_unsigned_short_5_5_5_1
> 
> Committed: https://crrev.com/fb9d8e245ac84c6c0806e86e7884b4775a84b4b5
> Cr-Commit-Position: refs/heads/master@{#361335}

TBR=kbr@chromium.org,adrian.belgun@intel.com,dongseong.hwang@intel.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=557848

[Corentin Wallez, 2016-07-08 21:23:39]

The CQ bit was checked by cwallez@chromium.org

[Corentin Wallez, 2016-07-08 21:23:39]

Created Revert of webgl: use immutable texture for the default FBO.

[commit-bot: I haz the power, 2016-07-08 21:24:02]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[Corentin Wallez, 2016-07-08 21:24:11]

Description was changed from

==========
Revert of webgl: use immutable texture for the default FBO. (patchset #2
id:20001 of https://codereview.chromium.org/1449043005/ )

Reason for revert:
https://bugs.chromium.org/p/chromium/issues/detail?id=626742

Original issue's description:
> webgl: use immutable texture for the default FBO.
> 
> Use immutable texture for the default FBO like chromium compositor.
> 
> In theory, it speeds up drawing speed, because immutable texture skips texture
> validation on drawing call.
> 
> In addition, immutable texture allows GL_INTEL_framebuffer_CMAA more
optimization.
> 
> BUG=557848
> TEST=
> WebglConformance.conformance_renderbuffers_framebuffer_state_restoration
> WebglConformance.conformance_textures_misc_texture_size_cube_maps
> WebglConformance.conformance_textures_misc_texture_sub_image_cube_maps
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgb_rgb_unsigned_byte
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgb_rgb_unsigned_short_5_6_5
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgba_rgba_unsigned_byte
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgba_rgba_unsigned_short_4_4_4_4
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgba_rgba_unsigned_short_5_5_5_1
> 
> Committed: https://crrev.com/fb9d8e245ac84c6c0806e86e7884b4775a84b4b5
> Cr-Commit-Position: refs/heads/master@{#361335}

TBR=kbr@chromium.org,adrian.belgun@intel.com,dongseong.hwang@intel.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=557848
==========

to

==========
Revert of webgl: use immutable texture for the default FBO. (patchset #2
id:20001 of https://codereview.chromium.org/1449043005/ )

Reason for revert:
https://bugs.chromium.org/p/chromium/issues/detail?id=626742

BUG=626742
Original issue's description:
> webgl: use immutable texture for the default FBO.
> 
> Use immutable texture for the default FBO like chromium compositor.
> 
> In theory, it speeds up drawing speed, because immutable texture skips texture
> validation on drawing call.
> 
> In addition, immutable texture allows GL_INTEL_framebuffer_CMAA more
optimization.
> 
> BUG=557848
> TEST=
> WebglConformance.conformance_renderbuffers_framebuffer_state_restoration
> WebglConformance.conformance_textures_misc_texture_size_cube_maps
> WebglConformance.conformance_textures_misc_texture_sub_image_cube_maps
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgb_rgb_unsigned_byte
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgb_rgb_unsigned_short_5_6_5
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgba_rgba_unsigned_byte
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgba_rgba_unsigned_short_4_4_4_4
>
WebglConformance.conformance_textures_webgl_canvas_tex_image_and_sub_image_2d_with_webgl_canvas_rgba_rgba_unsigned_short_5_5_5_1
> 
> Committed: https://crrev.com/fb9d8e245ac84c6c0806e86e7884b4775a84b4b5
> Cr-Commit-Position: refs/heads/master@{#361335}

TBR=kbr@chromium.org,adrian.belgun@intel.com,dongseong.hwang@intel.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=557848
==========

[commit-bot: I haz the power, 2016-07-08 21:27:44]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-07-08 21:27:45]

Try jobs failed on following builders:
  ios-simulator on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator/bui...)
  ios-simulator-gn on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/ios-simulator-gn/...)
  mac_chromium_rel_ng on master.tryserver.chromium.mac (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.mac/builders/mac_chromium_rel_...)
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)