Re^5-land "Move Uniform and UBO info to the gl::Program layer." This data was previously stored entirely in the Impl level. Move as much as possible to the GL level, using a read-only view in the Impl level. Some information in D3D-specific, and should be stored separately in the Impl. This patch has a lot of refactoring that splits the D3D and GL info, and moves as much validation as possible to the GL layer, where it is shared between the back-ends. Re-land with fix for dEQP unused uniforms. The fix involves storing a local copy of all uniform data in the GL layer. This will also let us validate sampler indexes during draw calls at the GL layer. Re-re-land with a fix for multiply defined symbols on Clang. Re-re-re-land with a fix for boolean uniforms and Uniform{1234}f. Re^4-land with a fix for boolean uniform arrays and UBO uniforms. Re^5-land with a fix for a test warning on Linux. BUG=angleproject:1123 TEST=end2end_tests, bots, dEQP GLES3.ubo and GLES2.uniform_api Change-Id: I03afcd446d9e74573c4d4c712ed7407b91d8001c Reviewed-on: https://chromium-review.googlesource.com/299180 Reviewed-by: Jamie Madill <jmadill@chromium.org> Tested-by: Jamie Madill <jmadill@chromium.org>