The great shader refactor: Delete all of the subclasses

The great shader refactor: Delete all of the subclasses

This changes all (except one) of the program typedefs in GLRenderer to
the same type.

All of the sub-classes for VertexShaderBase and FragmentShaderBase
(except for YUV textures) deleted, and their logic is moved into
ProgramBinding::Initialize sub-functions.

BUG=667966
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel

[ccameron, 2017-01-05 08:03:12]

Description was changed from

==========
The great shader refactor: Delete all of the subclasses

This changes all (except one) of the program typedefs in GLRenderer to
the same type.

All of the sub-classes for VertexShaderBase and FragmentShaderBase
(except for YUV textures) deleted, and their logic is moved into
ProgramBinding::Initialize sub-functions.

BUG=667966
==========

to

==========
The great shader refactor: Delete all of the subclasses

This changes all (except one) of the program typedefs in GLRenderer to
the same type.

All of the sub-classes for VertexShaderBase and FragmentShaderBase
(except for YUV textures) deleted, and their logic is moved into
ProgramBinding::Initialize sub-functions.

BUG=667966
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_trusty_blink_rel
==========

[ccameron, 2017-01-10 05:49:12]

The CQ bit was checked by ccameron@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-10 05:49:43]

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

[commit-bot: I haz the power, 2017-01-10 06:56:04]

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

[commit-bot: I haz the power, 2017-01-10 06:56:05]

Dry run: Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)