Abort ContextLost.WebGLContextLostFromQuantity if context creation fails.

content/test/gpu/gpu_tests/context_lost.py

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 import os
 import time
 
 from gpu_tests import context_lost_expectations
 from gpu_tests import gpu_test_base
 from gpu_tests import path_util
 
@@ skipping 14 matching lines @@
   domAutomationController._succeeded = false;
   domAutomationController._finished = false;
 
   domAutomationController.setAutomationId = function(id) {}
 
   domAutomationController.send = function(msg) {
     msg = msg.toLowerCase()
     if (msg == "loaded") {
       domAutomationController._loaded = true;
     } else if (msg == "success") {
-      domAutomationController._succeeded = true;
+      /* Don't squelch earlier failures! */
+      if (!domAutomationController._finished) {
+        domAutomationController._succeeded = true;
+      }
       domAutomationController._finished = true;
     } else {
+      /* Always record failures. */
       domAutomationController._succeeded = false;
       domAutomationController._finished = true;
     }
   }
 
   domAutomationController.reset = function() {
     domAutomationController._succeeded = false;
     domAutomationController._finished = false;
   }
 
@@ skipping 301 matching lines @@
         ps, ps.base_dir, self.GetExpectations()))
     ps.AddStory(WebGLContextLostFromLoseContextExtensionPage(
         ps, ps.base_dir, self.GetExpectations()))
     ps.AddStory(WebGLContextLostFromQuantityPage(
         ps, ps.base_dir, self.GetExpectations()))
     ps.AddStory(WebGLContextLostFromSelectElementPage(
         ps, ps.base_dir, self.GetExpectations()))
     ps.AddStory(WebGLContextLostInHiddenTabPage(
         ps, ps.base_dir, self.GetExpectations()))
     return ps