Output from failure:
  Overriding env[LC_ALL]=="English_United States.UTF-8" with default value "en_US.UTF-8"
  Chrome Env: {'TMP': 'e:\\b\\s\\w\\iticqhk9', 'LC_NUMERIC': 'English_United States.UTF-8', 'COMPUTERNAME': 'VM1315-M4', 'VS110COMNTOOLS': 'C:\\Program Files (x86)\\Microsoft Visual Studio 11.0\\Common7\\Tools\\', 'USERDOMAIN': 'GOLO', 'LC_CTYPE': 'English_United States.UTF-8', 'PSMODULEPATH': 'C:\\Windows\\system32\\WindowsPowerShell\\v1.0\\Modules\\', 'DISABLE_CLOUD_STORAGE_IO': '1', 'COMMONPROGRAMFILES': 'C:\\Program Files\\Common Files', 'GTEST_TOTAL_SHARDS': '4', 'PROGRAMFILES': 'C:\\Program Files', 'PROCESSOR_REVISION': '2d07', 'HOME': 'c:\\Users\\chrome-bot', 'BOTO_CONFIG': 'c:\\Users\\chrome-bot\\.boto', 'SYSTEMROOT': 'C:\\Windows', 'SWARMING_BOT_ID': 'vm1315-m4', 'PROGRAMFILES(X86)': 'C:\\Program Files (x86)', 'COMSPEC': 'C:\\Windows\\system32\\cmd.exe', 'LANG': 'en_US.UTF-8', 'VIRTUAL_ENV': 'e:\\b\\s\\w\\ir\\.swarming_module_cache\\vpython\\65026f', 'HOMEDRIVE': 'C:', 'SWARMING_SERVER': 'https://chromium-swarm.appspot.com', 'WINDOWS_TRACING_LOGFILE': 'C:\\BVTBin\\Tests\\installpackage\\csilogfile.log', 'SWARMING_TASK_ID': '40a13a87caabda11', 'LC_MONETARY': 'English_United States.UTF-8', 'CHROME_DEVEL_SANDBOX': '/opt/chromium/chrome_sandbox', 'COMMONPROGRAMFILES(X86)': 'C:\\Program Files (x86)\\Common Files', 'PUBLIC': 'C:\\Users\\Public', 'PROCESSOR_ARCHITECTURE': 'AMD64', 'SWARMING_HEADLESS': '1', 'ALLUSERSPROFILE': 'C:\\ProgramData', 'LC_MESSAGES': 'en_US.UTF-8', 'LOCALAPPDATA': 'C:\\Users\\chrome-bot\\AppData\\Local', 'PYTHONNOUSERSITE': '1', 'HOMEPATH': '\\Users\\chrome-bot', 'LUCI_CONTEXT': 'e:\\b\\s\\w\\iticqhk9\\luci_ctx.ries0d.json', 'VS120COMNTOOLS': 'C:\\Program Files (x86)\\Microsoft Visual Studio 12.0\\Common7\\Tools\\', 'CIPD_CACHE_DIR': 'e:\\b\\s\\cipd_cache\\cache', 'PROGRAMW6432': 'C:\\Program Files', 'USERNAME': 'chrome-bot', 'LC_ALL': 'en_US.UTF-8', 'LOGONSERVER': '\\\\AD1', 'PROMPT': '$P$G', 'WINDOWS_TRACING_FLAGS': '3', 'PROGRAMDATA': 'C:\\ProgramData', 'PYTHONPATH': 'e:\\b\\s\\w\\ir\\third_party\\catapult\\telemetry', 'BREAKPAD_DUMP_LOCATION': 'e:\\b\\s\\w\\iticqhk9\\tmpi5t1xs', 'GTEST_SHARD_INDEX': '0', 'VPYTHON_VIRTUALENV_ROOT': 'e:\\b\\s\\w\\ir\\.swarming_module_cache\\vpython', 'PATH': 'e:\\b\\s\\w\\ir\\.swarming_module_cache\\vpython\\65026f\\Scripts;e:\\b\\s\\w\\ir\\.swarming_module;e:\\b\\s\\w\\ir\\.swarming_module\\bin;e:\\b\\s\\cipd_cache\\bin;C:\\Windows\\system32;C:\\Windows;C:\\Windows\\System32\\Wbem;C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\Program Files (x86)\\Windows Kits\\8.1\\Windows Performance Toolkit\\;C:\\Program Files\\Microsoft SQL Server\\110\\Tools\\Binn\\;C:\\Program Files (x86)\\Microsoft SDKs\\TypeScript\\1.0\\;c:\\Tools;C:\\CMake\\bin;C:\\Program Files\\Puppet Labs\\Puppet\\bin;e:\\b\\s\\w\\ir\\.swarming_module_cache\\vpython\\65026f\\lib\\site-packages\\pywin32_system32;e:\\b\\s\\w\\ir\\.swarming_module_cache\\vpython\\65026f\\lib\\site-packages\\pywin32_system32;e:\\b\\s\\w\\ir\\.swarming_module_cache\\vpython\\65026f\\lib\\site-packages\\pywin32_system32;e:\\b\\s\\w\\ir\\.swarming_module_cache\\vpython\\65026f\\lib\\site-packages\\pywin32_system32', 'USERDNSDOMAIN': 'GOLO.CHROMIUM.ORG', 'NO_GCE_CHECK': 'False', 'CHROME_HEADLESS': '1', 'PATHEXT': '.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC', 'TMPDIR': 'e:\\b\\s\\w\\iticqhk9', 'SESSIONNAME': 'Console', 'FP_NO_HOST_CHECK': 'NO', 'WINDIR': 'C:\\Windows', 'TEMP': 'e:\\b\\s\\w\\iticqhk9', 'CIPD_PROTOCOL': 'v2', 'LC_COLLATE': 'English_United States.UTF-8', 'PROCESSOR_IDENTIFIER': 'Intel64 Family 6 Model 45 Stepping 7, GenuineIntel', 'NUMBER_OF_PROCESSORS': '8', 'APPDATA': 'C:\\Users\\chrome-bot\\AppData\\Roaming', 'PROCESSOR_LEVEL': '6', 'LC_TIME': 'English_United States.UTF-8', 'COMMONPROGRAMW6432': 'C:\\Program Files\\Common Files', 'OS': 'Windows_NT', 'SYSTEMDRIVE': 'C:', 'USERPROFILE': 'C:\\Users\\chrome-bot'}
  Starting Chrome ['../../out\\Release\\chrome.exe', '--disable-gpu', '--enable-net-benchmarking', '--metrics-recording-only', '--no-default-browser-check', '--no-first-run', '--ignore-background-tasks', '--enable-gpu-benchmarking', '--deny-permission-prompts', '--autoplay-policy=no-user-gesture-required', '--disable-background-networking', '--disable-component-extensions-with-background-pages', '--disable-default-apps', '--disable-search-geolocation-disclosure', '--proxy-server=socks://localhost:64683', '--ignore-certificate-errors-spki-list=PhrPvGIaAMmd29hj8BCZOq096yj7uMpRNHpn5PDxI6I=', '--remote-debugging-port=0', '--enable-crash-reporter-for-testing', '--disable-component-update', '--window-size=1280,1024', '--user-data-dir=e:\\b\\s\\w\\iticqhk9\\tmpz7ivkv', 'about:blank']
  DoNothingForwarder started between 127.0.0.1:64718 and 64718
  Browser started (pid=1688).
  OS: win win7
  Detailed OS version: 6.1.7601
  Browser command line: "../../out\Release\chrome.exe" --disable-gpu --enable-net-benchmarking --metrics-recording-only --no-default-browser-check --no-first-run --ignore-background-tasks --enable-gpu-benchmarking --deny-permission-prompts --autoplay-policy=no-user-gesture-required --disable-background-networking --disable-component-extensions-with-background-pages --disable-default-apps --disable-search-geolocation-disclosure --proxy-server=socks://localhost:64683 --ignore-certificate-errors-spki-list=PhrPvGIaAMmd29hj8BCZOq096yj7uMpRNHpn5PDxI6I= --remote-debugging-port=0 --enable-crash-reporter-for-testing --disable-component-update --window-size=1280,1024 --user-data-dir="e:\b\s\w\iticqhk9\tmpz7ivkv" --flag-switches-begin --flag-switches-end --file-url-path-alias="/gen=e:\b\s\w\ir\out\Release\gen" about:blank
  GPU device 0: VENDOR = 0x15ad (Google Inc.), DEVICE = 0x405 (Google SwiftShader)
  GPU Attributes:
    amd_switchable      : False
    can_support_threaded_texture_mailbox: False
    direct_composition_overlays: False
    direct_rendering    : True
    dx12_feature_level  : 0
    gl_extensions       : GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth24 GL_OES_depth32 GL_OES_depth_texture GL_OES_depth_texture_cube_map GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_element_index_uint GL_OES_fbo_render_mipmap GL_OES_framebuffer_object GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_surfaceless_context GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_texture_3D GL_OES_vertex_array_object GL_OES_vertex_half_float GL_EXT_blend_minmax GL_EXT_color_buffer_float GL_EXT_color_buffer_half_float GL_EXT_draw_buffers GL_EXT_instanced_arrays GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_texture_compression_dxt1 GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_texture_rg GL_ARB_texture_rectangle GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_APPLE_texture_format_BGRA8888 GL_CHROMIUM_color_buffer_float_rgba GL_CHROMIUM_texture_filtering_hint GL_NV_depth_buffer_float2 GL_NV_fence GL_NV_framebuffer_blit GL_NV_read_depth GL_NV_read_depth_stencil GL_NV_read_stencil 
    gl_renderer         : Google SwiftShader
    gl_reset_notification_strategy: 0
    gl_vendor           : Google Inc.
    gl_version          : OpenGL ES 3.0 SwiftShader 4.1.0.4
    gl_ws_extensions    : EGL_KHR_create_context EGL_KHR_get_all_proc_addresses EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_fence_sync EGL_KHR_image_base EGL_KHR_surfaceless_context EGL_ANGLE_iosurface_client_buffer EGL_ANDROID_framebuffer_target EGL_ANDROID_recordable
    gl_ws_vendor        : Google Inc.
    gl_ws_version       : 1.4 SwiftShader 4.1.0.4
    in_process_gpu      : False
    initialization_time : 0.032288
    jpeg_decode_accelerator_supported: False
    max_msaa_samples    : 4
    oop_rasterization_supported: True
    optimus             : False
    passthrough_cmd_decoder: False
    pixel_shader_version: 3.00
    process_crash_count : 0
    sandboxed           : True
    software_rendering  : True
    supports_dx12       : False
    supports_vulkan     : False
    vertex_shader_version: 3.00
    video_decode_accelerator_flags: 0
    vulkan_version      : 0
  Feature Status:
    2d_canvas           : unavailable_software
    flash_3d            : disabled_software
    flash_stage3d       : disabled_software
    flash_stage3d_baseline: disabled_software
    gpu_compositing     : disabled_software
    multiple_raster_threads: enabled_on
    native_gpu_memory_buffers: disabled_software
    oop_rasterization   : disabled_off
    protected_video_decode: disabled_off
    rasterization       : disabled_software
    skia_deferred_display_list: disabled_off
    skia_renderer       : disabled_off
    surface_control     : disabled_off
    surface_synchronization: enabled_on
    video_decode        : disabled_software
    viz_display_compositor: enabled_on
    webgl               : unavailable_software
    webgl2              : unavailable_software
  Issuing command to ts_proxy_server: set rtt 0
  Issuing command to ts_proxy_server: set inkbps 0
  Issuing command to ts_proxy_server: set outkbps 0
  PageCacheTemperature: any
  Issuing command to ts_proxy_server: set rtt 2
  Issuing command to ts_proxy_server: set inkbps 30720
  Issuing command to ts_proxy_server: set outkbps 15360
  Closing browser (pid=1688) ...
  Successfully shut down browser cooperatively
  Browser is closed.
  Traceback (most recent call last):
    File "e:\b\s\w\ir\third_party\catapult\telemetry\telemetry\page\page_run_end_to_end_unittest.py", line 274, in testTrafficSettings
      latencies_by_page_in_ms['fast'] + 40 - 2)
  AssertionError: 577.0 not greater than 634.0

This has been seen once but I didn't see an obvious CL in the set for the build with the first failure.  I want to see if this was a one-off before escalating.

This didn't happen again during the last 25 runs