Skip some webgl2_conformance_tests on Mac High Sierra

And remove some pixel_test suppressions.

Suppress on Intel High Sierra:
WebglConformance_deqp_functional_gles3_fbocolorbuffer_tex2d_00
WebglConformance_deqp_functional_gles3_fboinvalidate_format_00
WebglConformance_deqp_functional_gles3_framebufferblit_default_framebuffer_05

Suppress on Nvidia High Sierra:
WebglConformance_conformance2_glsl3_array_assign
WebglConformance_deqp_functional_gles3_fborender_resize_03
WebglConformance_deqp_functional_gles3_shaderindexing_mat_00
WebglConformance_deqp_functional_gles3_shaderindexing_mat_02
WebglConformance_deqp_functional_gles3_texturespecification_teximage2d_pbo_cube_00

Unsuppress on Intel High Sierra:
Pixel_OffscreenCanvas2DResizeOnWorker
Pixel_OffscreenCanvasAccelerated2D
Pixel_OffscreenCanvasAccelerated2DWorker

BUG=774809,774826,774827
TBR=kbr@chromium.org

Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;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: I3bd2b5dbfb48bd93b006ed87cc3efdad1bd46387
Reviewed-on: https://chromium-review.googlesource.com/720458
Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#508951}

content/test/gpu/gpu_tests/pixel_expectations.py

@@ -73,12 +73,6 @@ class PixelExpectations(GpuTestExpectations):
         ['android', ('qualcomm', 'Adreno (TM) 418')], bug=774354)
 
     # Failing on Mac Intel HighSierra
-    self.Fail('Pixel_OffscreenCanvas2DResizeOnWorker',
-        ['highsierra', ('intel', 0xa2e)], bug=774809)
-    self.Fail('Pixel_OffscreenCanvasAccelerated2D',
-        ['highsierra', ('intel', 0xa2e)], bug=774809)
-    self.Fail('Pixel_OffscreenCanvasAccelerated2DWorker',
-        ['highsierra', ('intel', 0xa2e)], bug=774809)
     self.Fail('Pixel_Video_MP4',
         ['highsierra', ('intel', 0xa2e)], bug=774809)
     self.Fail('Pixel_Video_VP9',

content/test/gpu/gpu_tests/webgl2_conformance_expectations.py

@@ -349,6 +349,26 @@ class WebGL2ConformanceExpectations(WebGLConformanceExpectations):
     self.Fail('conformance2/textures/misc/tex-mipmap-levels.html',
         ['sierra'], bug=705865)
 
+    # Regressions in 10.13
+    self.Fail('deqp/functional/gles3/fbocolorbuffer/tex2d_00.html',
+        ['highsierra', ('intel', 0xa2e)], bug=774826)
+    self.Fail('deqp/functional/gles3/fboinvalidate/format_00.html',
+        ['highsierra', ('intel', 0xa2e)], bug=774826)
+    self.Fail('deqp/functional/gles3/framebufferblit/' +
+        'default_framebuffer_05.html',
+        ['highsierra', ('intel', 0xa2e)], bug=774826)
+    self.Fail('conformance2/glsl3/array-assign.html',
+        ['highsierra', ('nvidia', 0xfe9)], bug=774827)
+    self.Fail('deqp/functional/gles3/fborender/resize_03.html',
+        ['highsierra', ('nvidia', 0xfe9)], bug=774827)
+    self.Fail('deqp/functional/gles3/shaderindexing/mat_00.html',
+        ['highsierra', ('nvidia', 0xfe9)], bug=774827)
+    self.Fail('deqp/functional/gles3/shaderindexing/mat_02.html',
+        ['highsierra', ('nvidia', 0xfe9)], bug=774827)
+    self.Fail('deqp/functional/gles3/texturespecification/' +
+        'teximage2d_pbo_cube_00.html',
+        ['highsierra', ('nvidia', 0xfe9)], bug=774827)
+
     # Fails on multiple GPU types.
     self.Fail('conformance2/glsl3/vector-dynamic-indexing-swizzled-lvalue.html',
         ['mac'], bug=709351)