Undo the recent stress changes to the context loss test.

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
 
 from telemetry import test as test_module
 from telemetry.core import util
 from telemetry.page import page_set
 from telemetry.page import page_test
 
@@ skipping 95 matching lines @@
         {
           'name': 'ContextLost.WebGLContextLostFromGPUProcessExit',
           'url': 'file://webgl.html?query=kill_after_notification',
           'script_to_evaluate_on_commit': harness_script,
           'navigate_steps': [
             { 'action': 'navigate' },
             { 'action': 'wait',
               'javascript': 'window.domAutomationController._loaded' }
           ],
           'kill_gpu_process': True,
-          'number_of_gpu_process_kills': 30,
+          'number_of_gpu_process_kills': 1,
         },
         {
           'name': 'ContextLost.WebGLContextLostFromLoseContextExtension',
           'url': 'file://webgl.html?query=WEBGL_lose_context',
           'script_to_evaluate_on_commit': harness_script,
           'navigate_steps': [
             { 'action': 'navigate' },
             { 'action': 'wait',
               'javascript': 'window.domAutomationController._finished' }
           ],
           'kill_gpu_process': False
         },
       ]
     }
     return page_set.PageSet.FromDict(page_set_dict, data_path)