Looks like what we call "checkerboarding" (even though there's no checkerboard pattern anymore).  

To be clear this is something that just regressed in the latest canary, right?

To Compositing/GPU teams for triage / de-dupe.

Can we get the device details? 
Adding an RB label for tracking purpose.

Yes, I regularly use the latest Canary, and this showed up only in the last days, so regression is correct.

I just tested *it also happens on the very latest 63.0.3206.0 on another Android phone* with Android 7.1.1.

Thanks for assigning to the right component.

Here is the output of about:gpu:


Note: To properly save this page, select the "Webpage, Complete" option in the Save File dialog.
Graphics Feature Status
Canvas: Hardware accelerated
CheckerImaging: Disabled
Flash: Hardware accelerated
Flash Stage3D: Hardware accelerated
Flash Stage3D Baseline profile: Hardware accelerated
Compositing: Hardware accelerated
Multiple Raster Threads: Disabled
Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
Rasterization: Hardware accelerated
Video Decode: Hardware accelerated
Video Encode: Hardware accelerated
WebGL: Hardware accelerated
WebGL2: Hardware accelerated
Driver Bug Workarounds
broken_egl_image_ref_counting
clear_uniforms_before_first_program_use
disable_blend_equation_advanced
disable_discard_framebuffer
disable_framebuffer_cmaa
disable_program_caching_for_transform_feedback
disable_program_disk_cache
dont_disable_webgl_when_compositor_context_lost
force_cube_map_positive_x_allocation
max_copy_texture_chromium_size_1048576
max_texture_size_limit_4096
multisample_renderbuffer_resize_emulation
scalarize_vec_and_mat_constructor_args
unbind_attachments_on_bound_render_fbo_delete
unbind_egl_context_to_flush_driver_caches
use_virtualized_gl_contexts
wake_up_gpu_before_drawing
Problems Detected
Non-virtual contexts on Qualcomm sometimes cause out-of-order frames: 289461
Applied Workarounds: use_virtualized_gl_contexts
The first draw operation from an idle state is slow: 309734
Applied Workarounds: wake_up_gpu_before_drawing
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
Adreno 420 driver loses FBO attachment contents on bound FBO deletion: 457027
Applied Workarounds: unbind_attachments_on_bound_render_fbo_delete
Adreno 420 driver drops draw calls after FBO invalidation: 443060
Applied Workarounds: disable_discard_framebuffer
EXT_disjoint_timer_query fails after 256 queries on adreno 4xx: 477514
Applied Workarounds: disable(GL_EXT_disjoint_timer_query)
GL_KHR_blend_equation_advanced breaks blending on Adreno 4xx: 488485
Applied Workarounds: disable_blend_equation_advanced
glFinish doesn't clear caches on Android: 509727
Applied Workarounds: unbind_egl_context_to_flush_driver_caches
Android Adreno crashes on binding incomplete cube map texture to FBO: 518889
Applied Workarounds: force_cube_map_positive_x_allocation
CHROMIUM_copy_texture with 1MB copy per flush to avoid unwanted cache growth on Adreno: 542478
Applied Workarounds: max_copy_texture_chromium_size_1048576
glReadPixels fails on FBOs with SRGB_ALPHA textures, Nexus 5X: 550292, 565179
Applied Workarounds: disable(GL_EXT_sRGB)
EGLImage ref counting across EGLContext/threads is broken: 585250
Applied Workarounds: broken_egl_image_ref_counting
Limit max texure size to 4096 on all of Android
Applied Workarounds: max_texture_size_limit_4096
Limited enabling of Chromium GL_INTEL_framebuffer_CMAA: 535198
Applied Workarounds: disable_framebuffer_cmaa
Disable KHR_blend_equation_advanced until cc shaders are updated: 661715
Applied Workarounds: disable(GL_KHR_blend_equation_advanced), disable(GL_KHR_blend_equation_advanced_coherent)
Program binaries don't contain transform feedback varyings on Qualcomm GPUs: 658074
Applied Workarounds: disable_program_caching_for_transform_feedback
Certain Adreno 4xx and 5xx drivers often crash in glProgramBinary.: 699122
Applied Workarounds: disable_program_disk_cache
Multisampled color renderbuffers can't be resized on Qualcomm 4xx/5xx: 696126
Applied Workarounds: multisample_renderbuffer_resize_emulation
eglSwapBuffers intermittently fails on Android when app goes to background: 744678
Applied Workarounds: dont_disable_webgl_when_compositor_context_lost
Raster is using a single thread.
Disabled Features: multiple_raster_threads
Native GpuMemoryBuffers have been disabled, either via about:flags or command line.
Disabled Features: native_gpu_memory_buffers
Checker-imaging has been disabled via finch trial or the command line.
Disabled Features: checker_imaging
Version Information
Data exported	9/6/2017, 9:10:15 AM
Chrome version	Chrome/63.0.3204.0
Operating system	Android 7.1.2
Software rendering list version	13.12
Driver bug list version	10.28
ANGLE commit id	e8ef2bc4bd01
2D graphics backend	Skia/63 3e177260ea298735d3be488a5a56a632d63321ea-
Command Line	_ --use-mobile-user-agent --top-controls-show-threshold=0.5 --top-controls-hide-threshold=0.5 --use-mobile-user-agent --enable-pinch --enable-viewport --validate-input-event-stream --enable-longpress-drag-selection --touch-selection-strategy=direction --disable-gpu-process-crash-limit --main-frame-resizes-are-orientation-changes --disable-composited-antialiasing --ui-prioritize-in-gpu-process --profiler-timing=0 --enable-dom-distiller --flag-switches-begin --enable-features=ChromeHome,ContentSuggestionsCategoryRanker,ContextualSuggestionsCarousel --flag-switches-end -- --strict-mode=testing --help --enable-test-intents
Driver Information
Initialization time	97
In-process GPU	false
Passthrough Command Decoder	false
Supports overlays	false
Sandboxed	false
GPU0	VENDOR = 0x0000 [Qualcomm], DEVICE= 0x0000 [Adreno (TM) 430]
Optimus	false
Optimus	false
AMD switchable	false
Driver vendor	
Driver version	145.0
Driver date	
Pixel shader version	3.20
Vertex shader version	3.20
Max. MSAA samples	4
Machine model name	Nexus 6P
Machine model version	
GL_VENDOR	Qualcomm
GL_RENDERER	Adreno (TM) 430
GL_VERSION	OpenGL ES 3.2 V@145.0 (GIT@Idb2b4cb785)
GL_EXTENSIONS	GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_sync GL_OES_vertex_half_float GL_OES_framebuffer_object GL_OES_rgb8_rgba8 GL_OES_compressed_ETC1_RGB8_texture GL_AMD_compressed_ATC_texture GL_KHR_texture_compression_astc_ldr GL_OES_texture_npot GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_OES_texture_3D GL_EXT_color_buffer_float GL_EXT_color_buffer_half_float GL_QCOM_alpha_test GL_OES_depth24 GL_OES_packed_depth_stencil GL_OES_depth_texture GL_OES_depth_texture_cube_map GL_EXT_sRGB GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_EXT_texture_type_2_10_10_10_REV GL_EXT_texture_sRGB_decode GL_OES_element_index_uint GL_EXT_copy_image GL_EXT_geometry_shader GL_EXT_tessellation_shader GL_OES_texture_stencil8 GL_EXT_shader_io_blocks GL_OES_shader_image_atomic GL_OES_sample_variables GL_EXT_texture_border_clamp GL_EXT_multisampled_render_to_texture GL_OES_shader_multisample_interpolation GL_EXT_texture_cube_map_array GL_EXT_draw_buffers_indexed GL_EXT_gpu_shader5 GL_EXT_robustness GL_EXT_texture_buffer GL_OES_texture_storage_multisample_2d_array GL_OES_sample_shading GL_OES_get_program_binary GL_EXT_debug_label GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent GL_QCOM_tiled_rendering GL_ANDROID_extension_pack_es31a GL_EXT_primitive_bounding_box GL_OES_standard_derivatives GL_OES_vertex_array_object GL_EXT_disjoint_timer_query GL_KHR_debug GL_EXT_YUV_target GL_EXT_sRGB_write_control GL_EXT_texture_norm16 GL_EXT_discard_framebuffer GL_OES_surfaceless_context GL_OVR_multiview GL_OVR_multiview2 GL_EXT_texture_sRGB_R8 GL_KHR_no_error GL_EXT_debug_marker GL_OES_EGL_image_external_essl3 GL_OVR_multiview_multisampled_render_to_texture GL_EXT_buffer_storage GL_EXT_blit_framebuffer_params GL_EXT_protected_textures
Disabled Extensions	GL_EXT_disjoint_timer_query GL_EXT_sRGB GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent
Window system binding vendor	
Window system binding version	
Window system binding extensions	
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
R_16	Software only
RG_88	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
RGBA_F16	Software only
YVU_420	Software only
YUV_420_BIPLANAR	Software only
UYVY_422	Software only

Related: https://bugs.chromium.org/p/chromium/issues/detail?id=762465

Also, why is this bug restricted?

Able to reproduce the issue on Chrome# 63.0.3204.0 using Pixel XL (Android 7.1.2).
This is a regression issue broken in M62. Assigning to the owner manually as per revision bisect could not provide a possible suspect due to Crash builds being invoked.

Chrome Good Build -- 62.0.3200.0
Chrome Bad  Build -- 62.0.3202.7

CL --
https://chromium.googlesource.com/chromium/src/+log/62.0.3200.0..62.0.3202.0?pretty=fuller&n=10000

Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/bbea8a99d2643b97d9dfe9d368cba6d129850a28

@sunyunjia -- Could you please look into the issue, kindly re-assign if it has nothing to do with your changes.

Note: Please find the logs here --
go/chrome-androidlogs/762043

Thanks!!

I think this might be a duplicate of  issue 760886  (which is now fixed in Canary).

Sandeep, can you please try in latest canary and update the behavior.

Just to update, tested the issue using #63.0.3212.0 on Pixel XL (Android 7.1.2), and issue is not reproducible now. Observed the page is loading without any blank spaces.

Thanks!!

Issue is same as " issue 760886 " as mentioned in comment #10. 

Issue doesn't repro on latest M62 & M63 Builds. 

Tested on : Pixel XL/(NJH47D), Nexus 5X/(NRD90R), Samsung Galaxy J2/(LMY47X), Micromax Q372/5.1 (LRX21M), Sony Xperia XA/6.0(33.2.B.2.93), ASUS_Z010D /6.0.1(MMB29P), Htc Desire 630/6.0.1(1.00.400.3)