See: https://build.chromium.org/p/chromium.gpu/builders/Win7%20Release%20%28ATI%29?numbuilds=200

https://build.chromium.org/p/chromium.gpu/builders/Win7%20Release%20%28ATI%29/builds/15501

[ RUN      ] ContextLost.WebGLContextLostFromGPUProcessExit
(INFO) 2016-04-22 14:17:30,714 desktop_browser_backend._TryCooperativeShutdown:508  Successfully shut down browser cooperatively
(INFO) 2016-04-22 14:17:30,714 desktop_browser_backend.GetBrowserStartupArgs:242  Requested remote debugging port: 0
(INFO) 2016-04-22 14:17:30,714 desktop_browser_backend.Start:274  Starting Chrome ['c:\\users\\chrome~1\\appdata\\local\\temp\\runrgkkfl\\out\\Release\\chrome.exe', '--js-flags=--expose-gc', '--enable-logging=stderr', '--disable-domain-blocking-for-3d-apis', '--disable-gpu-process-crash-limit', '--enable-gpu-benchmarking', '--enable-net-benchmarking', '--metrics-recording-only', '--no-default-browser-check', '--no-first-run', '--enable-gpu-benchmarking', '--disable-background-networking', '--no-proxy-server', '--disable-component-extensions-with-background-pages', '--disable-default-apps', '--remote-debugging-port=0', '--enable-crash-reporter-for-testing', '--window-size=1280,1024', '--user-data-dir=c:\\users\\chrome~1\\appdata\\local\\temp\\tmpxxboli\\tmpqrhpwa', 'about:blank']
(INFO) 2016-04-22 14:17:30,823 desktop_browser_backend.HasBrowserFinishedLaunching:229  Discovered ephemeral port 64827
[2552:3920:0422/141731:INFO:CONSOLE(29)] "Harness injected.", source:  (29)
Backtrace:
	content::GpuChildThread::OnCrash [0x5E69A48B+11]
	??$Dispatch@VGpuChildThread@content@@V12@XP812@AEXXZ@?$MessageT@UGpuMsg_Crash_Meta@@V?$tuple@$$V@std@@X@IPC@@SA_NPBVMessage@1@PAVGpuChildThread@content@@1PAXP834@AEXXZ@Z [0x5E698C50+192]
	content::GpuChildThread::OnControlMessageReceived [0x5E69A2D6+582]
	content::ChildThreadImpl::OnMessageReceived [0x5DFD0422+594]
	content::GpuChildThread::OnMessageReceived [0x5E69AD73+19]
	IPC::ChannelProxy::Context::OnDispatchMessage [0x5CF0636B+43]
	base::internal::Invoker<base::IndexSequence<0,1>,base::internal::BindState<base::internal::RunnableAdapter<void (__thiscall content::InputEventFilter::*)(IPC::Message const &)>,void __cdecl(content::InputEventFilter *,IPC::Message const &),content::InputE [0x5CF066B6+22]
	base::debug::TaskAnnotator::RunTask [0x5CEDBC77+247]
	base::MessageLoop::RunTask [0x5CEB234D+765]
	base::MessageLoop::DoWork [0x5CEB1D83+547]
	base::MessagePumpForUI::DoRunLoop [0x5CEDCA6A+90]
	base::MessagePumpWin::Run [0x5CEDCFAA+74]
	base::MessageLoop::RunHandler [0x5CEB2041+17]
	base::RunLoop::Run [0x5CEDD6F8+88]
	base::MessageLoop::Run [0x5CEB201D+29]
	content::GpuMain [0x5E697FFD+2669]
	content::RunNamedProcessTypeMain [0x5CE8DF50+256]
	content::ContentMainRunnerImpl::Run [0x5CE8DE16+134]
	content::ContentMain [0x5CE8B313+35]
	ChromeMain [0x5CDF3F1B+107]
	MainDllLoader::Launch [0x00E7735C+812]
	wWinMain [0x00E76BA7+487]
	__scrt_common_main_seh [0x00ED03F8+253] (f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:255)
	BaseThreadInitThunk [0x767D337A+18]
	RtlInitializeExceptionChain [0x770C92B2+99]
	RtlInitializeExceptionChain [0x770C9285+54]
[0422/141731:ERROR:process_info.cc(608)] range at 0xfffde000, size 0x230 fully unreadable
[0422/141731:ERROR:process_info.cc(608)] range at 0xfffdd000, size 0xf84 fully unreadable
[0422/141731:ERROR:process_info.cc(608)] range at 0xfffda000, size 0xf84 fully unreadable
[0422/141731:ERROR:process_info.cc(608)] range at 0xfffd7000, size 0xf84 fully unreadable
[0422/141731:ERROR:process_info.cc(608)] range at 0xfffaf000, size 0xf84 fully unreadable
[0422/141731:ERROR:process_info.cc(608)] range at 0xfffac000, size 0xf84 fully unreadable
[0422/141731:ERROR:process_info.cc(608)] range at 0xfffa9000, size 0xf84 fully unreadable
[0422/141731:ERROR:process_info.cc(608)] range at 0xfffa6000, size 0xf84 fully unreadable
[5096:4336:0422/141731:ERROR:gpu_channel_host.cc(229)] Failed to send GpuChannelMsg_CreateCommandBuffer.
[5096:4336:0422/141731:ERROR:webgraphicscontext3d_command_buffer_impl.cc(209)] Failed to initialize command buffer.
[2552:3920:0422/141731:INFO:CONSOLE(0)] "WebGL: CONTEXT_LOST_WEBGL: loseContext: context lost", source: http://127.0.0.1:64811/webgl.html?query=kill_after_notification (0)
(INFO) 2016-04-22 14:19:01,871 desktop_browser_backend.GetStackTrace:484  Minidump found: c:\users\chrome~1\appdata\local\temp\tmpxxboli\tmpgdxxch\reports\f0130bd8-64c8-495c-8fed-158677a24dfc.dmp
Can't get standard output with --show-stdout
(INFO) 2016-04-22 14:20:33,749 desktop_browser_backend.GetStackTrace:484  Minidump found: c:\users\chrome~1\appdata\local\temp\tmpxxboli\tmpgdxxch\reports\f0130bd8-64c8-495c-8fed-158677a24dfc.dmp
Tab crashed while navigating to chrome://gpucrash
Waiting for page to finish.
Tab crashed while closing chrome://gpucrash
Traceback (most recent call last):
  File "c:\users\chrome~1\appdata\local\temp\runrgkkfl\third_party\catapult\telemetry\telemetry\internal\story_runner.py", line 84, in _RunStoryAndProcessErrorIfNeeded
    state.RunStory(results)
  File "c:\users\chrome~1\appdata\local\temp\runrgkkfl\content\test\gpu\gpu_tests\gpu_test_base.py", line 111, in RunStory
    RunStoryWithRetries(GpuSharedPageState, self, results)
  File "c:\users\chrome~1\appdata\local\temp\runrgkkfl\content\test\gpu\gpu_tests\gpu_test_base.py", line 72, in RunStoryWithRetries
    super(cls, shared_page_state).RunStory(results)
  File "c:\users\chrome~1\appdata\local\temp\runrgkkfl\third_party\catapult\telemetry\telemetry\page\shared_page_state.py", line 326, in RunStory
    self._current_page, self._current_tab, results)
  File "c:\users\chrome~1\appdata\local\temp\runrgkkfl\content\test\gpu\gpu_tests\context_lost.py", line 156, in ValidateAndMeasurePage
    'Test didn\'t complete (no context lost event?)')
Failure: Test didn't complete (no context lost event?)

Can't get standard output with --show-stdout
(INFO) 2016-04-22 14:22:09,723 desktop_browser_backend.GetStackTrace:484  Minidump found: c:\users\chrome~1\appdata\local\temp\tmpxxboli\tmpgdxxch\reports\f0130bd8-64c8-495c-8fed-158677a24dfc.dmp
Can't get standard output with --show-stdout
(INFO) 2016-04-22 14:22:15,693 exception_formatter.PrintFormattedException:19  Try printing formatted exception: None None None

Exception raised when cleaning story run: 

Traceback (most recent call last):
  _RunStoryAndProcessErrorIfNeeded at c:\users\chrome~1\appdata\local\temp\runrgkkfl\third_party\catapult\telemetry\telemetry\internal\story_runner.py:104
    state.DidRunStory(results)
  DidRunStory at c:\users\chrome~1\appdata\local\temp\runrgkkfl\third_party\catapult\telemetry\telemetry\page\shared_page_state.py:163
    self._current_tab.Close()
  Close at c:\users\chrome~1\appdata\local\temp\runrgkkfl\third_party\catapult\telemetry\telemetry\internal\browser\tab.py:100
    self._tab_list_backend.CloseTab(self.id)
  CloseTab at c:\users\chrome~1\appdata\local\temp\runrgkkfl\third_party\catapult\telemetry\telemetry\internal\backends\chrome\tab_list_backend.py:66
    util.WaitFor(lambda: tab_id not in self.IterContextIds(), timeout=5)
  WaitFor at c:\users\chrome~1\appdata\local\temp\runrgkkfl\third_party\catapult\telemetry\telemetry\core\util.py:94
    (timeout, GetConditionString()))
TimeoutException: Timed out while waiting 5s for util.WaitFor(lambda: tab_id not in self.IterContextIds(), timeout=5).

Locals:
  GetConditionString       : <function GetConditionString at 0x03C6FDB0>
  condition                : <function <lambda> at 0x03C358F0>
  elapsed_time             : 5.101999998092651
  last_output_elapsed_time : 5.101999998092651
  last_output_time         : 1461360130.591
  max_poll_interval        : 5
  min_poll_interval        : 0.1
  now                      : 1461360135.693
  output_interval          : 300
  poll_interval            : 0.46380000114440917
  res                      : False
  start_time               : 1461360130.591
  timeout                  : 5

[  FAILED  ] ContextLost.WebGLContextLostFromGPUProcessExit (285288 ms)