For example https://build.chromium.org/p/chromium.gpu.fyi/builders/Mac%20GPU%20ASAN%20Release/builds/2052

[135/170] gpu_tests.webgl_conformance_integration_test.WebGLConformanceIntegrationTest.WebglConformance_deqp_functional_gles3_shaderoperator_common_functions failed unexpectedly 321.7956s:
  
  Traceback (most recent call last):
    _RunGpuTest at content/test/gpu/gpu_tests/gpu_integration_test.py:73
      self.RunActualGpuTest(url, *args)
    RunActualGpuTest at content/test/gpu/gpu_tests/webgl_conformance_integration_test.py:203
      getattr(self, test_name)(test_path, *args[1:])
    _RunConformanceTest at content/test/gpu/gpu_tests/webgl_conformance_integration_test.py:217
      self._CheckTestCompletion()
    _CheckTestCompletion at content/test/gpu/gpu_tests/webgl_conformance_integration_test.py:211
      'webglTestHarness._finished', timeout=300)
    traced_function at third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
      return func(*args, **kwargs)
    WaitForJavaScriptCondition at third_party/catapult/telemetry/telemetry/internal/actions/action_runner.py:252
      return self._tab.WaitForJavaScriptCondition(*args, **kwargs)
    traced_function at third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
      return func(*args, **kwargs)
    WaitForJavaScriptCondition at third_party/catapult/telemetry/telemetry/internal/browser/web_contents.py:191
      return self._inspector_backend.WaitForJavaScriptCondition(*args, **kwargs)
    traced_function at third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py:52
      return func(*args, **kwargs)
    WaitForJavaScriptCondition at third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_backend.py:294
      e.message + '\n' + debug_message)
  TimeoutException: Timed out while waiting 300s for IsJavaScriptExpressionTrue.
  Console output:
  
  Locals:
    IsJavaScriptExpressionTrue : <function IsJavaScriptExpressionTrue at 0x10ea9df50>
    condition                  : 'webglTestHarness._finished'
    context_id                 : None
    debug_message              : 'Console output:\n'
    e                          : TimeoutException('Timed out while waiting 300s for IsJavaScriptExpressionTrue.',)
    kwargs                     : {}
    timeout                    : 300
  
  Found crashpad_database_util
  No minidump found via crashpad_database_util
  No minidump paths to symbolize
  Found crashpad_database_util
  No minidump found via crashpad_database_util
  Restarting browser due to unexpected test failure
  Starting browser, attempt 1 of 3
  Requested remote debugging port: 0
  Starting Chrome ['/b/s/w/irzdtm7n/out/Release/Chromium.app/Contents/MacOS/Chromium', '--disable-gpu-watchdog', '--test-type=gpu', '--disable-domain-blocking-for-3d-apis', '--disable-gesture-requirement-for-media-playback', '--disable-gpu-process-crash-limit', '--enable-experimental-canvas-features', '--js-flags=--expose-gc', '--enable-es3-apis', '--enable-logging=stderr', '--enable-net-benchmarking', '--metrics-recording-only', '--no-default-browser-check', '--no-first-run', '--enable-gpu-benchmarking', '--disable-background-networking', '--proxy-server=socks://localhost:58091', '--ignore-certificate-errors', '--disable-component-extensions-with-background-pages', '--disable-default-apps', '--disable-search-geolocation-disclosure', '--remote-debugging-port=0', '--enable-crash-reporter-for-testing', '--window-size=1280,1024', '--user-data-dir=/b/s/w/itD3GsGW/tmp4Opw1q', 'about:blank']
  Discovered ephemeral port 58527
  OS: mac sierra
  Model: MacBookPro
  GPU device 0: VENDOR = 0x1002 (ATI), DEVICE = 0x6821
  GPU device 1: VENDOR = 0x8086 (Intel), DEVICE = 0xd26
  GPU Attributes:
    amd_switchable      : True
    basic_info_state    : 1
    context_info_state  : 1
    direct_rendering    : True
    driver_date         : 
    driver_vendor       : 
    driver_version      : 10.22.25
    encrypted_only      : False
    gl_extensions       : GL_ARB_blend_func_extended GL_ARB_draw_buffers_blend GL_ARB_draw_indirect GL_ARB_ES2_compatibility GL_ARB_explicit_attrib_location GL_ARB_gpu_shader_fp64 GL_ARB_gpu_shader5 GL_ARB_instanced_arrays GL_ARB_internalformat_query GL_ARB_occlusion_query2 GL_ARB_sample_shading GL_ARB_sampler_objects GL_ARB_separate_shader_objects GL_ARB_shader_bit_encoding GL_ARB_shader_subroutine GL_ARB_shading_language_include GL_ARB_tessellation_shader GL_ARB_texture_buffer_object_rgb32 GL_ARB_texture_cube_map_array GL_ARB_texture_gather GL_ARB_texture_query_lod GL_ARB_texture_rgb10_a2ui GL_ARB_texture_storage GL_ARB_texture_swizzle GL_ARB_timer_query GL_ARB_transform_feedback2 GL_ARB_transform_feedback3 GL_ARB_vertex_attrib_64bit GL_ARB_vertex_type_2_10_10_10_rev GL_ARB_viewport_array GL_EXT_debug_label GL_EXT_debug_marker GL_EXT_framebuffer_multisample_blit_scaled GL_EXT_texture_compression_s3tc GL_EXT_texture_filter_anisotropic GL_EXT_texture_sRGB_decode GL_APPLE_client_storage GL_APPLE_container_object_shareable GL_APPLE_flush_render GL_APPLE_object_purgeable GL_APPLE_rgb_422 GL_APPLE_row_bytes GL_APPLE_texture_range GL_ATI_texture_mirror_once GL_NV_texture_barrier
    gl_renderer         : Intel Iris Pro OpenGL Engine
    gl_reset_notification_strategy: 0
    gl_vendor           : Intel Inc.
    gl_version          : 4.1 INTEL-10.22.25
    gl_ws_extensions    : 
    gl_ws_vendor        : 
    gl_ws_version       : 
    in_process_gpu      : False
    initialization_time : 0.057081
    jpeg_decode_accelerator_supported: False
    max_framerate_denominator: 1
    max_framerate_numerator: 30
    max_msaa_samples    : 8
    max_resolution_height: 2160
    max_resolution_width: 4096
    min_resolution_height: 16
    min_resolution_width: 16
    optimus             : False
    passthrough_cmd_decoder: False
    pixel_shader_version: 4.10
    process_crash_count : 0
    profile             : 0
    sandboxed           : True
    software_rendering  : False
    vertex_shader_version: 4.10
    video_decode_accelerator_flags: 0
  Feature Status:
    2d_canvas           : enabled
    flash_3d            : enabled
    flash_stage3d       : enabled
    flash_stage3d_baseline: enabled
    gpu_compositing     : enabled
    multiple_raster_threads: enabled_on
    native_gpu_memory_buffers: enabled
    rasterization       : enabled
    video_decode        : enabled
    video_encode        : enabled
    vpx_decode          : enabled
    webgl               : enabled
    webgl2              : enabled
  Driver Bug Workarounds:
    add_and_true_to_loop_condition
    adjust_src_dst_region_for_blitframebuffer
    decode_encode_srgb_for_generatemipmap
    disable_framebuffer_cmaa
    disable_multimonitor_multisampling
    disable_webgl_rgb_multisampling_usage
    emulate_abs_int_function
    get_frag_data_info_bug
    init_two_cube_map_levels_before_copyteximage
    msaa_is_slow
    pack_parameters_workaround_with_pack_buffer
    rebind_transform_feedback_before_resume
    regenerate_struct_names
    remove_invariant_and_centroid_for_essl3
    reset_base_mipmap_level_before_texstorage
    rewrite_texelfetchoffset_to_texelfetch
    scalarize_vec_and_mat_constructor_args
    set_zero_level_before_generating_mipmap
    unfold_short_circuit_as_ternary_operation
    unpack_alignment_workaround_with_unpack_buffer
    unpack_image_height_workaround_with_unpack_buffer
    use_intermediary_for_copy_texture_image
    use_unused_standard_shared_blocks
  Started browser successfully.
  Traceback (most recent call last):
    File "/b/s/w/irzdtm7n/third_party/catapult/telemetry/telemetry/testing/serially_executed_browser_test_case.py", line 194, in <lambda>
      return lambda self: based_method(self, *args)
    File "/b/s/w/irzdtm7n/content/test/gpu/gpu_tests/gpu_integration_test.py", line 73, in _RunGpuTest
      self.RunActualGpuTest(url, *args)
    File "/b/s/w/irzdtm7n/content/test/gpu/gpu_tests/webgl_conformance_integration_test.py", line 203, in RunActualGpuTest
      getattr(self, test_name)(test_path, *args[1:])
    File "/b/s/w/irzdtm7n/content/test/gpu/gpu_tests/webgl_conformance_integration_test.py", line 217, in _RunConformanceTest
      self._CheckTestCompletion()
    File "/b/s/w/irzdtm7n/content/test/gpu/gpu_tests/webgl_conformance_integration_test.py", line 211, in _CheckTestCompletion
      'webglTestHarness._finished', timeout=300)
    File "/b/s/w/irzdtm7n/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 52, in traced_function
      return func(*args, **kwargs)
    File "/b/s/w/irzdtm7n/third_party/catapult/telemetry/telemetry/internal/actions/action_runner.py", line 252, in WaitForJavaScriptCondition
      return self._tab.WaitForJavaScriptCondition(*args, **kwargs)
    File "/b/s/w/irzdtm7n/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 52, in traced_function
      return func(*args, **kwargs)
    File "/b/s/w/irzdtm7n/third_party/catapult/telemetry/telemetry/internal/browser/web_contents.py", line 191, in WaitForJavaScriptCondition
      return self._inspector_backend.WaitForJavaScriptCondition(*args, **kwargs)
    File "/b/s/w/irzdtm7n/third_party/catapult/common/py_trace_event/py_trace_event/trace_event_impl/decorators.py", line 52, in traced_function
      return func(*args, **kwargs)
    File "/b/s/w/irzdtm7n/third_party/catapult/telemetry/telemetry/internal/backends/chrome_inspector/inspector_backend.py", line 294, in WaitForJavaScriptCondition
      e.message + '\n' + debug_message)
  TimeoutException: Timed out while waiting 300s for IsJavaScriptExpressionTrue.
  Console output:
  
[25482:49683:0315/123515.929712:WARNING:simple_synchronous_entry.cc(1054)] Could not open platform files for entry.