Run the WebGL conformance tests with the passthrough command decoder.

content/test/gpu/gpu_tests/gpu_test_expectations.py

Index: content/test/gpu/gpu_tests/gpu_test_expectations.py
diff --git a/content/test/gpu/gpu_tests/gpu_test_expectations.py b/content/test/gpu/gpu_tests/gpu_test_expectations.py
index 9df6f00736c167bfa7fae30e4b28016f22c79483..b8f4d0e635a136877f3b525f15f3981f344bd21d 100644
--- a/content/test/gpu/gpu_tests/gpu_test_expectations.py
+++ b/content/test/gpu/gpu_tests/gpu_test_expectations.py
@@ -5,7 +5,7 @@
 from gpu_tests import test_expectations
 
 ANGLE_CONDITIONS = ['d3d9', 'd3d11', 'opengl', 'no_angle']
-
+CMD_DECODER_CONDITIONS = ['passthrough', 'no_passthrough']
 GPU_CONDITIONS = ['amd', 'arm', 'broadcom', 'hisilicon', 'intel', 'imagination',
                   'nvidia', 'qualcomm', 'vivante']
 
@@ -15,6 +15,7 @@ class GpuExpectation(test_expectations.Expectation):
     self.gpu_conditions = []
     self.device_id_conditions = []
     self.angle_conditions = []
+    self.cmd_decoder_conditions = []
     self.max_num_retries = max_num_retries
     assert self.max_num_retries == 0 or expectation == 'flaky'
     super(GpuExpectation, self).__init__(
@@ -67,6 +68,8 @@ class GpuExpectation(test_expectations.Expectation):
         self.gpu_conditions.append(cl)
       elif cl in ANGLE_CONDITIONS:
         self.angle_conditions.append(cl)
+      elif cl in CMD_DECODER_CONDITIONS:
+        self.cmd_decoder_conditions.append(cl)
       else:
         # Delegate to superclass.
         super(GpuExpectation, self).ParseCondition(condition)
@@ -112,8 +115,12 @@ class GpuTestExpectations(test_expectations.TestExpectations):
       angle_matches = (
         (not expectation.angle_conditions) or
         angle_renderer in expectation.angle_conditions)
+      cmd_decoder = self._GetCommandDecoder(gpu_info)
+      cmd_decoder_matches = (
+        (not expectation.cmd_decoder_conditions) or
+        cmd_decoder in expectation.cmd_decoder_conditions)
 
-    return gpu_matches and angle_matches
+    return gpu_matches and angle_matches and cmd_decoder_matches
 
   def _GetGpuVendorString(self, gpu_info):
     if gpu_info:
@@ -149,3 +156,9 @@ class GpuTestExpectations(test_expectations.TestExpectations):
         elif 'OpenGL' in gl_renderer:
           return 'opengl'
     return 'no_angle'
+
+  def _GetCommandDecoder(self, gpu_info):
+    if gpu_info and gpu_info.aux_attributes and \
+        gpu_info.aux_attributes.get('passthrough_cmd_decoder', False):
+      return 'passthrough'
+    return 'no_passthrough'