Increase GPU test timeout to avoid fragility

content/test/gpu/gpu_tests/webgl_conformance.py

Index: content/test/gpu/gpu_tests/webgl_conformance.py
diff --git a/content/test/gpu/gpu_tests/webgl_conformance.py b/content/test/gpu/gpu_tests/webgl_conformance.py
index 277c5375770decd10f2314af957c7ba91ff8fc32..5fb6884b09ca2cdf79e640d5f30b15c948239cef 100644
--- a/content/test/gpu/gpu_tests/webgl_conformance.py
+++ b/content/test/gpu/gpu_tests/webgl_conformance.py
@@ -140,7 +140,7 @@ class WebglConformancePage(gpu_test_base.PageBase):
   def RunNavigateSteps(self, action_runner):
     super(WebglConformancePage, self).RunNavigateSteps(action_runner)
     action_runner.WaitForJavaScriptCondition(
-        'webglTestHarness._finished', timeout_in_seconds=180)
+        'webglTestHarness._finished', timeout_in_seconds=300)

[nednguyen, 2016/03/11 01:35:03]

Not my codebase but I think  maybe the better way is doing polling to check if
the test suite is making progress instead of doing this long wait?

[Ken Russell (switch to Gerrit), 2016/03/14 20:23:26]

I'm not sure how that would be implemented -- there aren't any convenient hooks
in the WebGL tests to detect progress. This seems OK.

 
 class WebglConformance(gpu_test_base.TestBase):
   """Conformance with Khronos WebGL Conformance Tests"""