Fix race condition in GpuProcess_skip_gpu_process.

content/test/gpu/gpu_tests/gpu_process_expectations.py

Index: content/test/gpu/gpu_tests/gpu_process_expectations.py
diff --git a/content/test/gpu/gpu_tests/gpu_process_expectations.py b/content/test/gpu/gpu_tests/gpu_process_expectations.py
index 6a74f2bea906d9ef49635b8afd773efa02380a35..b2f13df7d9d40ffd2ffa8461486cf14489ec8177 100644
--- a/content/test/gpu/gpu_tests/gpu_process_expectations.py
+++ b/content/test/gpu/gpu_tests/gpu_process_expectations.py
@@ -20,7 +20,13 @@ class GpuProcessExpectations(GpuTestExpectations):
     # Chrome on Windows creates a GPU process that uses SwiftShader when using
     # either --disable-gpu or a blacklisted GPU.
     self.Skip('GpuProcess_no_gpu_process', ['win', 'debug'], bug=630728)
-    self.Skip('GpuProcess_skip_gpu_process', ['win', 'debug'], bug=630728)
+    self.Skip('GpuProcess_skip_gpu_process', ['win'], bug=630728)
+
+    # Currently SwiftShader's integrated only on Windows. Remove
+    # platforms from this suppression as it is integrated on more
+    # platforms.
+    self.Skip('GpuProcess_swiftshader_for_webgl',
+              ['mac', 'linux', 'android', 'chromeos'], bug=630728)
 
     # There is no Android multi-gpu configuration and the helper
     # gpu_info_collector.cc::IdentifyActiveGPU is not even called.