Failed here: https://uberchromegw.corp.google.com/i/chromium.gpu/builders/Mac%2010.10%20Retina%20Release%20%28AMD%29/builds/24952/steps/pixel_test%20on%20ATI%20GPU%20on%20Mac%20Retina/logs/stdio

output:
Pixel_2DCanvasWebGL (gpu_tests.pixel_integration_test.PixelIntegrationTest) ... [3697:33027:0105/135019.001889:WARNING:simple_synchronous_entry.cc(1054)] Could not open platform files for entry.
[3697:1295:0105/135019.990996:INFO:CONSOLE(63)] "'webkitRequestAnimationFrame' is vendor-specific. Please use the standard 'requestAnimationFrame' instead.", source: http://127.0.0.1:49906/pixel_canvas2d_webgl.html (63)
/b/s/w/irW5w0Ol/third_party/catapult/telemetry/telemetry/internal/image_processing/_bitmap.py:152: UserWarning: Using pure python png decoder, which could be very slow. To speed up, consider installing numpy & cv2 (OpenCV).
  'Using pure python png decoder, which could be very slow. To speed up, '
(INFO) 2017-01-05 13:50:26,842 cloud_storage._GetLocked:274  Downloading gs://chromium-gpu-archive/reference-images/Pixel_2DCanvasWebGL_v3_mac_1002_6821_msaa.png to /b/s/w/itxlhDVG/tmpKau2Oq.png
(INFO) 2017-01-05 13:50:27,655 cloud_storage._GetLocked:274  Downloading gs://chromium-telemetry/binary_dependencies/bitmaptools_c7b1bfc6399dc683058e88dac1ef0f877edea74b to /b/s/w/irW5w0Ol/third_party/catapult/telemetry/telemetry/internal/bin/mac/x86_64/bitmaptools
ok
Pixel_CSS3DBlueBox (gpu_tests.pixel_integration_test.PixelIntegrationTest) ... [3697:1295:0105/135030.149748:INFO:CONSOLE(45)] "'webkitRequestAnimationFrame' is vendor-specific. Please use the standard 'requestAnimationFrame' instead.", source: http://127.0.0.1:49906/pixel_css3d.html (45)
(INFO) 2017-01-05 13:50:35,552 cloud_storage._GetLocked:274  Downloading gs://chromium-gpu-archive/reference-images/Pixel_CSS3DBlueBox_v16_mac_1002_6821_msaa.png to /b/s/w/itxlhDVG/tmp8Grmbx.png
(WARNING) 2017-01-05 13:50:38,071 gpu_integration_test._RunGpuTest:137  Pixel_CSS3DBlueBox was expected to fail, but passed.

ok
Pixel_CSSFilterEffects (gpu_tests.pixel_integration_test.PixelIntegrationTest) ... [3697:1295:0105/135038.093806:INFO:CONSOLE(144)] "'webkitRequestAnimationFrame' is vendor-specific. Please use the standard 'requestAnimationFrame' instead.", source: http://127.0.0.1:49906/filter_effects.html (144)
[3697:1295:0105/135038.094901:INFO:CONSOLE(50)] "Uncaught ReferenceError: main is not defined", source: http://127.0.0.1:49906/pixel_css3d.html (50)
(INFO) 2017-01-05 13:50:45,610 cloud_storage._GetLocked:274  Downloading gs://chromium-gpu-archive/reference-images/Pixel_CSSFilterEffects_v4_mac_1002_6821_msaa.png to /b/s/w/itxlhDVG/tmpqrTu4v.png
ok
Pixel_CSSFilterEffects_NoOverlays (gpu_tests.pixel_integration_test.PixelIntegrationTest) ... (WARNING) 2017-01-05 13:50:48,414 pixel_integration_test.RestartBrowserIfNecessaryWithArgs:92  Restarting browser with arguments: ['--disable-mac-overlays']
[3697:1295:0105/135048.497776:WARNING:url_request_context_getter.cc(43)] URLRequestContextGetter leaking due to no owning thread.
(WARNING) 2017-01-05 13:50:48,752 desktop_browser_finder.FindAllAvailableBrowsers:147  Chrome build location for mac_x86_64 not found. Browser will be run without Flash.
(INFO) 2017-01-05 13:50:48,753 browser_finder.FindBrowser:123  Chose browser: PossibleDesktopBrowser(type=release, executable=/b/s/w/irW5w0Ol/out/Release/Chromium.app/Contents/MacOS/Chromium, flash=None)
(WARNING) 2017-01-05 13:50:48,753 gpu_integration_test.StartBrowser:38  Starting browser, attempt 1 of 3
2017-01-05 13:50:48.764 defaults[3748:34366] Couldn't find an application named "/b/s/w/irW5w0Ol/out/Release/Chromium.app/Contents/MacOS/Chromium"; defaults unchanged
(INFO) 2017-01-05 13:50:48,765 desktop_browser_backend.GetBrowserStartupArgs:251  Requested remote debugging port: 0
(INFO) 2017-01-05 13:50:48,765 desktop_browser_backend.Start:292  Starting Chrome ['/b/s/w/irW5w0Ol/out/Release/Chromium.app/Contents/MacOS/Chromium', '--test-type=gpu', '--js-flags=--expose-gc', '--enable-logging=stderr', '--disable-mac-overlays', '--enable-gpu-benchmarking', '--enable-net-benchmarking', '--metrics-recording-only', '--no-default-browser-check', '--no-first-run', '--enable-gpu-benchmarking', '--disable-background-networking', '--proxy-server=socks://localhost:49894', '--ignore-certificate-errors', '--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=/b/s/w/itxlhDVG/tmpwoXYN9', 'about:blank']
[3749:1295:0105/135048.977803:ERROR:variations_util.cc(88)] Missing Worker Pool Configuration: Background
2017-01-05 13:50:49.011 Chromium[3749:34367] NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7fa3aa629b30>. Break on NSLog to debug.
2017-01-05 13:50:49.011 Chromium[3749:34367] Call stack:
(
    "+callStackSymbols disabled for performance reasons"
)
(INFO) 2017-01-05 13:50:49,074 desktop_browser_backend.HasBrowserFinishedLaunching:238  Discovered ephemeral port 49958
(INFO) 2017-01-05 13:50:49,332 browser._LogBrowserInfo:113  OS: mac elcapitan
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:117  Model: MacBookPro
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:120  GPU device 0: VENDOR = 0x1002 (ATI), DEVICE = 0x6821
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:120  GPU device 1: VENDOR = 0x8086 (Intel), DEVICE = 0xd26
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:122  GPU Attributes:
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    adapter_luid        : 0
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    amd_switchable      : True
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    basic_info_state    : 1
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    context_info_state  : 1
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    direct_rendering    : True
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    driver_date         : 
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    driver_vendor       : 
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    driver_version      : 10.14.73
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    encrypted_only      : False
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    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
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    gl_renderer         : Intel Iris Pro OpenGL Engine
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    gl_reset_notification_strategy: 0
(INFO) 2017-01-05 13:50:49,346 browser._LogBrowserInfo:124    gl_vendor           : Intel Inc.
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    gl_version          : 4.1 INTEL-10.14.73
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    gl_ws_extensions    : 
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    gl_ws_vendor        : 
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    gl_ws_version       : 
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    in_process_gpu      : False
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    initialization_time : 0.023154
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    jpeg_decode_accelerator_supported: False
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    lenovo_dcute        : False
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    max_framerate_denominator: 1
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    max_framerate_numerator: 30
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    max_msaa_samples    : 8
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    max_resolution_height: 2160
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    max_resolution_width: 4096
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    min_resolution_height: 16
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    min_resolution_width: 16
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    optimus             : False
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    passthrough_cmd_decoder: False
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    pixel_shader_version: 4.10
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    process_crash_count : 0
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    profile             : 0
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    sandboxed           : True
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    software_rendering  : False
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    vertex_shader_version: 4.10
(INFO) 2017-01-05 13:50:49,347 browser._LogBrowserInfo:124    video_decode_accelerator_flags: 0
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:126  Feature Status:
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    2d_canvas           : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    flash_3d            : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    flash_stage3d       : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    flash_stage3d_baseline: enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    gpu_compositing     : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    multiple_raster_threads: enabled_on
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    native_gpu_memory_buffers: enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    rasterization       : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    video_decode        : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    video_encode        : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    vpx_decode          : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    webgl               : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:128    webgl2              : enabled
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:130  Driver Bug Workarounds:
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:132    add_and_true_to_loop_condition
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:132    adjust_src_dst_region_for_blitframebuffer
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:132    decode_encode_srgb_for_generatemipmap
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:132    disable_framebuffer_cmaa
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:132    disable_multimonitor_multisampling
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:132    disable_webgl_rgb_multisampling_usage
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:132    emulate_abs_int_function
(INFO) 2017-01-05 13:50:49,348 browser._LogBrowserInfo:132    get_frag_data_info_bug
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    init_one_cube_map_level_before_copyteximage
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    msaa_is_slow
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    pack_parameters_workaround_with_pack_buffer
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    rebind_transform_feedback_before_resume
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    regenerate_struct_names
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    remove_invariant_and_centroid_for_essl3
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    reset_base_mipmap_level_before_texstorage
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    rewrite_float_unary_minus_operator
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    rewrite_texelfetchoffset_to_texelfetch
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    scalarize_vec_and_mat_constructor_args
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    set_zero_level_before_generating_mipmap
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    unfold_short_circuit_as_ternary_operation
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    unpack_alignment_workaround_with_unpack_buffer
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    unpack_image_height_workaround_with_unpack_buffer
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    use_intermediary_for_copy_texture_image
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    use_shadowed_tex_level_params
(INFO) 2017-01-05 13:50:49,349 browser._LogBrowserInfo:132    use_unused_standard_shared_blocks
[3749:50435:0105/135049.362236:WARNING:simple_synchronous_entry.cc(1054)] Could not open platform files for entry.
[3749:1295:0105/135049.394169:INFO:CONSOLE(144)] "'webkitRequestAnimationFrame' is vendor-specific. Please use the standard 'requestAnimationFrame' instead.", source: http://127.0.0.1:49906/filter_effects.html (144)
[3749:1295:0105/135049.395077:INFO:CONSOLE(94)] "Uncaught ReferenceError: main is not defined", source: http://127.0.0.1:49906/filter_effects.html (94)
(INFO) 2017-01-05 13:50:56,842 cloud_storage._GetLocked:274  Downloading gs://chromium-gpu-archive/reference-images/Pixel_CSSFilterEffects_NoOverlays_v4_mac_1002_6821_msaa.png to /b/s/w/itxlhDVG/tmp6TEqko.png
ok
Pixel_Canvas2DRedBox (gpu_tests.pixel_integration_test.PixelIntegrationTest) ... (WARNING) 2017-01-05 13:50:59,666 pixel_integration_test.RestartBrowserIfNecessaryWithArgs:92  Restarting browser with arguments: []
[3749:1295:0105/135059.725325:WARNING:url_request_context_getter.cc(43)] URLRequestContextGetter leaking due to no owning thread.
(WARNING) 2017-01-05 13:51:00,042 desktop_browser_finder.FindAllAvailableBrowsers:147  Chrome build location for mac_x86_64 not found. Browser will be run without Flash.
(INFO) 2017-01-05 13:51:00,043 browser_finder.FindBrowser:123  Chose browser: PossibleDesktopBrowser(type=release, executable=/b/s/w/irW5w0Ol/out/Release/Chromium.app/Contents/MacOS/Chromium, flash=None)
(WARNING) 2017-01-05 13:51:00,043 gpu_integration_test.StartBrowser:38  Starting browser, attempt 1 of 3
2017-01-05 13:51:00.053 defaults[3769:34998] Couldn't find an application named "/b/s/w/irW5w0Ol/out/Release/Chromium.app/Contents/MacOS/Chromium"; defaults unchanged
(INFO) 2017-01-05 13:51:00,054 desktop_browser_backend.GetBrowserStartupArgs:251  Requested remote debugging port: 0
(INFO) 2017-01-05 13:51:00,054 desktop_browser_backend.Start:292  Starting Chrome ['/b/s/w/irW5w0Ol/out/Release/Chromium.app/Contents/MacOS/Chromium', '--test-type=gpu', '--js-flags=--expose-gc', '--enable-logging=stderr', '--enable-gpu-benchmarking', '--enable-net-benchmarking', '--metrics-recording-only', '--no-default-browser-check', '--no-first-run', '--enable-gpu-benchmarking', '--disable-background-networking', '--proxy-server=socks://localhost:49894', '--ignore-certificate-errors', '--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=/b/s/w/itxlhDVG/tmpzONOKs', 'about:blank']
[3770:1295:0105/135100.261842:ERROR:variations_util.cc(88)] Missing Worker Pool Configuration: Background
2017-01-05 13:51:00.297 Chromium[3770:34999] NSWindow warning: adding an unknown subview: <FullSizeContentView: 0x7f92a3f37a50>. Break on NSLog to debug.
2017-01-05 13:51:00.297 Chromium[3770:34999] Call stack:
(
    "+callStackSymbols disabled for performance reasons"
)

Test succeeded on next run.