gpu: Simplify CHROMIUM_texture_mailbox API.

- Remove ProduceTextureCHROMIUM from GLES2Interface.  Change all call sites
  to use ProduceTextureDirectCHROMIUM.
- Remove <target> from ProduceTextureDirectCHROMIUM.
- Remove <target> from CreateAndConsumeTextureCHROMIUM.

BUG=757607

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: Ic50059a0db3edfaeb51690645bce096f4f64228e
Reviewed-on: https://chromium-review.googlesource.com/780807
Commit-Queue: Victor Miura <[email protected]>
Reviewed-by: Ian Vollick <[email protected]>
Reviewed-by: Dominic Mazzoni <[email protected]>
Reviewed-by: Kenneth Russell <[email protected]>
Reviewed-by: David Reveman <[email protected]>
Reviewed-by: Dale Curtis <[email protected]>
Reviewed-by: Bill Budge <[email protected]>
Reviewed-by: danakj <[email protected]>
Cr-Commit-Position: refs/heads/master@{#521952}
64 files changed