Merge pull request KhronosGroup#1594 from KhronosGroup/fix-1591

Fix pathological complexity explosion for certain shaders.

Merge pull request KhronosGroup#1466 from KhronosGroup/fix-1465

Clean up and fix awkward conditional branch codegen.

Merge pull request KhronosGroup#1410 from KhronosGroup/fix-1406

GLSL: Support switch more properly in legacy ESSL

Merge pull request KhronosGroup#1366 from KhronosGroup/fix-1365

HLSL: Implement image queries for UAV images.

Merge pull request KhronosGroup#1309 from KhronosGroup/fix-1305

Expose query if a resource was used as a comparison/depth resource

Merge pull request KhronosGroup#1284 from KhronosGroup/fix-1282

MSL: Reintroduce workarounds for arrays not being value types

Update license headers to 2020.

Merge pull request KhronosGroup#1235 from KhronosGroup/patch-input-ar…

…ray-fix

GLSL: Fix array of input patch variables.

Merge pull request KhronosGroup#1192 from kakashidinho/master

Added BUILD.gn file to be used by Chromium's ANGLE project

Run format_all.sh.