I suspect that ANGLE's EGL context creation is failing. Was about:gpu gathered after running one WebGL page that failed to initialize? If not, could you please do that to see if there are any logs at the bottom?

Copy/pasting plaintext about:gpu here is fine; PDF not needed. Thanks.

P.S. That graphics card's really old -- 7 years -- please consider an upgrade. That will definitely solve your problem.

I've got my client to capture another chrome:gpu output as requested, however they also had their IT personnel install a new graphics card (nvidia gt 710), and it is still not working.

I've attached the output (sorry - it was captured as a pdf, as an image i believe so i can't even copy and past the text out of it for you)

It is surprising to me that the 710 is not working. Unfortunately I am representing one of my clients here (I am a developer) and do not have direct access to their machine to fiddle.

Deleted: chrome___gpu for Nvidia GT 710 after deselect hw.pdf 568 KB

chrome___gpu for Nvidia GT 710 after deselect hw.pdf 568 KB Download

Looks like this is a stable build of chrome but the --enable-unsafe-es3-apis flag is being used (probably from "WebGL 2.0 Prototype" in about:flags).  This might not be falling back correctly.

It's also surprising that there is no log in the about:gpu about failing to create contexts.  Maybe the about:gpu was not captured after attempting to view webgl content?

This may be the issue that I'm currently experiencing. After upgrading to Chrome v54.0.2840.59, WebGL doesn't work, e.g. on http://get.webgl.org/ as suggested above. My graphics drivers are the most current (NVidia 341.98 for GeForce GTX 260).

My about:gpu has some interesting logs, though:

GpuProcessHostUIShim: The GPU process exited normally. Everything is okay.
[4116:9516:1017/133042:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CF05F8]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4116:9516:1017/133042:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CF05F8]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4116:9516:1017/133042:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CF05F8]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4116:9516:1017/133042:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CF05F8]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4116:9516:1017/133042:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CF05F8]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4116:9516:1017/133042:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CF05F8]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4116:9516:1017/133042:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CF05F8]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4116:9516:1017/133042:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CF05F8]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:

Please provide about:gpu content

Here's the complete output of about:gpu

Deleted: gpu.html 275 KB

gpu.html 275 KB View Download

Same issue with WEBGL in windows 8.1 and windows 10 on my nVidia GTS250 video adapter after update from 53.x to Version 54.0.2840.59 m (64-bit);
Works well on Windows 7 system with installed that video adapter (nVidia GTS250) on another PC with same browser( 54.0.2840.59) and same video driver as on win10 and win8.1. 
Win 10 and win 8.1 works well with most newest nvidia GTX 960, also works well with GTS 250 in Firefox

Deleted: chrome___gpu for GTS 250.pdf 139 KB

chrome___gpu for GTS 250.pdf 139 KB Download

Hey guys tested it out on nVidia 9600 GSO and had the same issue.

here are the logs:
[6124:5744:1026/030918:ERROR:gles2_cmd_decoder.cc(15953)] : [.DisplayCompositor-0000000009AA2420]GL ERROR :GL_INVALID_OPERATION : glCreateAndConsumeTextureCHROMIUM: invalid mailbox name
[6124:5744:1026/030918:ERROR:gles2_cmd_decoder.cc(8803)] : [.DisplayCompositor-0000000009AA2420]RENDER WARNING: texture bound to texture unit 0 is not renderable. It maybe non-power-of-2 and have incompatible texture filtering.
[6124:5744:1026/030918:ERROR:gles2_cmd_decoder.cc(15953)] : [.DisplayCompositor-0000000009AA2420]GL ERROR :GL_INVALID_OPERATION : glCreateAndConsumeTextureCHROMIUM: invalid mailbox name
[6124:5744:1026/030918:ERROR:gles2_cmd_decoder.cc(8803)] : [.DisplayCompositor-0000000009AA2420]RENDER WARNING: texture bound to texture unit 0 is not renderable. It maybe non-power-of-2 and have incompatible texture filtering.

Hope this helps.

I have another client with the out of memory issue.

Graphics Feature Status
Canvas: Hardware accelerated
Flash: Hardware accelerated
Flash Stage3D: Hardware accelerated
Flash Stage3D Baseline profile: Hardware accelerated
Compositing: Hardware accelerated
Multiple Raster Threads: Enabled
Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
Rasterization: Software only. Hardware acceleration disabled
Video Decode: Hardware accelerated
Video Encode: Hardware accelerated
VPx Video Decode: Software only, hardware acceleration unavailable
WebGL: Hardware accelerated
Driver Bug Workarounds
clear_uniforms_before_first_program_use
disable_direct_composition
disable_discard_framebuffer
disable_dxgi_zero_copy_video
disable_framebuffer_cmaa
exit_on_context_lost
force_cube_complete
scalarize_vec_and_mat_constructor_args
texsubimage_faster_than_teximage
use_current_program_after_successful_link
Problems Detected
VPx decoding isn't supported before Windows 10 anniversary update.: 616318
Disabled Features: accelerated_vpx_decode
Always call glUseProgram after a successful link to avoid a driver bug:  349137 
Applied Workarounds: use_current_program_after_successful_link
Some drivers are unable to reset the D3D device in the GPU process sandbox
Applied Workarounds: exit_on_context_lost
TexSubImage is faster for full uploads on ANGLE
Applied Workarounds: texsubimage_faster_than_teximage
Clear uniforms before first program use on all platforms: 124764, 349137
Applied Workarounds: clear_uniforms_before_first_program_use
Always rewrite vec/mat constructors to be consistent: 398694
Applied Workarounds: scalarize_vec_and_mat_constructor_args
ANGLE crash on glReadPixels from incomplete cube map texture: 518889
Applied Workarounds: force_cube_complete
Framebuffer discarding can hurt performance on non-tilers: 570897
Applied Workarounds: disable_discard_framebuffer
Direct composition flashes black initially on Win <10: 588588
Applied Workarounds: disable_direct_composition
Zero copy DXGI video hangs on shutdown on Win < 8.1: 621190
Applied Workarounds: disable_dxgi_zero_copy_video
Limited enabling of Chromium GL_INTEL_framebuffer_CMAA: 535198
Applied Workarounds: disable_framebuffer_cmaa
Accelerated rasterization has been disabled, either via blacklist, about:flags or the command line.
Disabled Features: rasterization
Native GpuMemoryBuffers have been disabled, either via about:flags or command line.
Disabled Features: native_gpu_memory_buffers
Version Information
Data exported	10/25/2016, 8:42:18 AM
Chrome version	Chrome/54.0.2840.71
Operating system	Windows NT 6.1.7601 SP1
Software rendering list version	11.12
Driver bug list version	9.00
ANGLE commit id	905fbdea9ef0
2D graphics backend	Skia/54 a21f10dd8b19c6cb47d07d94d0a0525c16461969
Command Line Args	Files (x86)\Google\Chrome\Application\chrome.exe" --flag-switches-begin --flag-switches-end
Driver Information
Initialization time	63
In-process GPU	false
Sandboxed	false
GPU0	VENDOR = 0x10de, DEVICE= 0x06e4
Optimus	false
AMD switchable	false
Desktop compositing	Aero Glass
Diagonal Monitor Size of \\.\DISPLAY1	22.0"
Driver vendor	NVIDIA
Driver version	9.18.13.4144
Driver date	2-3-2015
Pixel shader version	4.0
Vertex shader version	4.0
Max. MSAA samples	8
Machine model name	
Machine model version	
GL_VENDOR	Google Inc.
GL_RENDERER	ANGLE (NVIDIA GeForce 8400 GS Direct3D11 vs_4_0 ps_4_0)
GL_VERSION	OpenGL ES 2.0 (ANGLE 2.1.0.905fbdea9ef0)
GL_EXTENSIONS	GL_OES_element_index_uint GL_OES_packed_depth_stencil GL_OES_get_program_binary GL_OES_rgb8_rgba8 GL_EXT_texture_format_BGRA8888 GL_EXT_read_format_bgra GL_NV_pixel_buffer_object GL_OES_mapbuffer GL_EXT_map_buffer_range GL_EXT_color_buffer_half_float GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_float GL_OES_texture_float_linear GL_EXT_texture_rg GL_EXT_texture_compression_dxt1 GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_OES_compressed_ETC1_RGB8_texture GL_EXT_sRGB GL_ANGLE_depth_texture GL_OES_depth32 GL_EXT_texture_storage GL_OES_texture_npot GL_EXT_draw_buffers GL_EXT_texture_filter_anisotropic GL_EXT_occlusion_query_boolean GL_NV_fence GL_EXT_disjoint_timer_query GL_EXT_robustness GL_EXT_blend_minmax GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_pack_reverse_row_order GL_OES_standard_derivatives GL_EXT_shader_texture_lod GL_EXT_frag_depth GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_EXT_discard_framebuffer GL_EXT_debug_marker GL_OES_EGL_image GL_OES_EGL_image_external GL_NV_EGL_stream_consumer_external GL_EXT_unpack_subimage GL_NV_pack_subimage GL_OES_vertex_array_object GL_KHR_debug GL_ANGLE_lossy_etc_decode GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_sync_query GL_CHROMIUM_copy_texture
Disabled Extensions	
Window system binding vendor	Google Inc. (adapter LUID: 0000000000007343)
Window system binding version	1.4 (ANGLE 2.1.0.905fbdea9ef0)
Window system binding extensions	EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility
Direct rendering	Yes
Reset notification strategy	0x8252
GPU process crash count	0
Compositor Information
Tile Update Mode	One-copy
Partial Raster	Enabled
GpuMemoryBuffers Status
ATC	Software only
ATCIA	Software only
DXT1	Software only
DXT5	Software only
ETC1	Software only
R_8	Software only
BGR_565	Software only
RGBA_4444	Software only
RGBX_8888	Software only
RGBA_8888	Software only
BGRX_8888	Software only
BGRA_8888	Software only
YVU_420	Software only
YUV_420_BIPLANAR	Software only
UYVY_422	Software only
Diagnostics
0
b3DAccelerationEnabled	true
b3DAccelerationExists	true
bAGPEnabled	true
bAGPExistenceValid	true
bAGPExists	true
bCanRenderWindow	true
bDDAccelerationEnabled	true
bDriverBeta	false
bDriverDebug	false
bDriverSigned	false
bDriverSignedValid	false
bNoHardware	false
dwBpp	32
dwDDIVersion	10
dwHeight	1050
dwRefreshRate	59
dwWHQLLevel	0
dwWidth	1680
iAdapter	0
lDriverSize	17559432
lMiniVddSize	0
szAGPStatusEnglish	Enabled
szAGPStatusLocalized	Enabled
szChipType	GeForce 8400 GS
szD3DStatusEnglish	Enabled
szD3DStatusLocalized	Enabled
szDACType	Integrated RAMDAC
szDDIVersionEnglish	10
szDDIVersionLocalized	10
szDDStatusEnglish	Enabled
szDDStatusLocalized	Enabled
szDXVAHDEnglish	Supported
szDXVAModes	ModeMPEG2_A ModeMPEG2_C ModeVC1_C ModeWMV9_C
szDescription	NVIDIA GeForce 8400 GS
szDeviceId	0x06E4
szDeviceIdentifier	{D7B71E3E-45A4-11CF-8073-0D201CC2C435}
szDeviceName	\\.\DISPLAY1
szDisplayMemoryEnglish	2282 MB
szDisplayMemoryLocalized	2282 MB
szDisplayModeEnglish	1680 x 1050 (32 bit) (59Hz)
szDisplayModeLocalized	1680 x 1050 (32 bit) (59Hz)
szDriverAssemblyVersion	9.18.13.4144
szDriverAttributes	Final Retail
szDriverDateEnglish	2/20/2015 00:43:24
szDriverDateLocalized	2/20/2015 12:43:24 AM
szDriverLanguageEnglish	English
szDriverLanguageLocalized	English
szDriverModelEnglish	WDDM 1.1
szDriverModelLocalized	WDDM 1.1
szDriverName	nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
szDriverNodeStrongName	oem32.inf:NVIDIA_SetA_Devices.NTamd64.6.1:Section014:9.18.13.4144:pci\ven_10de&dev_06e4
szDriverSignDate	
szDriverVersion	9.18.0013.4144
szKeyDeviceID	Enum\PCI\VEN_10DE&DEV_06E4&SUBSYS_00000000&REV_A1
szKeyDeviceKey	\Registry\Machine\System\CurrentControlSet\Control\Video\{C7FD9D75-F794-48BC-BC79-518463D24A65}\0000
szManufacturer	NVIDIA
szMiniVdd	n/a
szMiniVddDateEnglish	n/a
szMiniVddDateLocalized	n/a
szMonitorMaxRes	
szMonitorName	Generic PnP Monitor
szNotesEnglish	No problems found.
szNotesLocalized	No problems found.
szOverlayEnglish	Supported
szRankOfInstalledDriver	00E00003
szRegHelpText	
szRevision	
szRevisionId	0x00A1
szSubSysId	0x00000000
szTestResultD3D7English	Not run
szTestResultD3D7Localized	Not run
szTestResultD3D8English	Not run
szTestResultD3D8Localized	Not run
szTestResultD3D9English	Not run
szTestResultD3D9Localized	Not run
szTestResultDDEnglish	Not run
szTestResultDDLocalized	Not run
szVdd	n/a
szVendorId	0x10DE
Log Messages
[4784:4788:1025/083612:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05BF0038]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083612:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05BF0038]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083612:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05BF0038]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083612:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05BF0038]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083612:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05BF0038]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083612:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05BF0038]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083612:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05BF0038]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083612:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05BF0038]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083627:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CDDD08]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083627:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CDDD08]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083627:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CDDD08]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083627:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05CDDD08]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083641:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05F88E18]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083641:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05F88E18]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083641:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05F88E18]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083641:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-05F88E18]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083651:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0C732630]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083651:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0C732630]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083651:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0C732630]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083651:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0C732630]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083716:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0489BA00]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083716:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0489BA00]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083716:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0489BA00]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083716:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0489BA00]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083716:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0489BA00]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083716:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0489BA00]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083716:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0489BA00]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083716:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0489BA00]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083730:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0532CE40]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083730:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0532CE40]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083730:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0532CE40]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083730:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0532CE40]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083730:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0532CE40]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083730:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0532CE40]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083730:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0532CE40]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083730:ERROR:gles2_cmd_decoder.cc(7713)] : [.Offscreen-For-WebGL-0532CE40]GL ERROR :GL_OUT_OF_MEMORY : glRenderbufferStorageMultisampleCHROMIUM:
[4784:4788:1025/083816:ERROR:mf_helpers.cc(12)] : Error in dxva_video_decode_accelerator_win.cc on line 345
GpuProcessHostUIShim: The GPU process exited normally. Everything is okay.

The --disable_chromium_framebuffer_multisample worked for the client in comment {12}

--disable_chromium_framebuffer_multisample worked for me as well on nVidia 9600 GSO

perhaps maybe until the issue is fixed an autodisable framebuffer multisample when the GL_OUT_OF_MEMORY occurs would be of great help, especially when people depend on webgl for business with clients.

 Issue 660642  has been merged into this issue.