Easily reproducible on Mac.

Bisected down to the following range: https://chromium.googlesource.com/chromium/src/+log/cae1058e62b7960796709512c4e1e650b6389c0f..994c65ef57ec7c84b18fd66d7b8b85e5a2dc29bd

Reverting crrev.com/ccb9e13712b1632b889960d1d85d556c0139fd51 (with two another patches atop) mitigated the issue.

This issue combined with several others I am looking at  http://crbug.com/634239   http://crbug.com/633869   http://crbug.com/633750  is sufficient to warrant reverting my change as time to fix is not clear. I will prepare revert patch.

I can reproduce on linux with --enable-prefer-compositing-to-lcd-text

Still repros even if I revert the culling in rtree.cc and drawing_display_item.cc.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/490867260447e9360b52d5c03417b000490332e0

commit 490867260447e9360b52d5c03417b000490332e0
Author: wkorman <wkorman@chromium.org>
Date: Fri Aug 05 22:24:57 2016

Revert "Raster display item lists via a visual rect RTree."

Meta-revert for http://crrev.com/1484163002 due to bugs found in ui/views and
DevTools.

Original change description:

    Raster display item lists via a visual rect RTree.

    Rather than caching and playing back an entire SkPicture
    when rastering a display item list for a particular
    playback rect, instead retain display items and query
    them via an RTree of their visual rects to find and
    raster only what's needed.

    Display item lists no longer support the notion of a
    bounding "layer rect" with mutable origin.

    DisplayItemListSettings proto is obsolete after this
    change as it's comprised solely of one field to allow
    switching whether to use the aforementioned now-deleted
    cached SkPicture code path. It will be deleted in a
    subsequent patch.

Revert "Raster display item lists via a visual rect RTree."

This reverts commit ccb9e13712b1632b889960d1d85d556c0139fd51.

Revert "Don't clear visual rects when finalizing display item lists for now."

This reverts commit 1adf72a0a0a3e04151cc740d15ab19655b1e7e5e.

Revert "Delete obsolete DisplayItemList::ProcessAppendedItem method definition."

This reverts commit f652746f56c59523b0440cf18b769f8ba779d15d.

BUG= 529938 , 633750 , 633869 , 634239 , 634823 , 634959 
TBR=chrishtr@chromium.org,vmpstr@chromium.org,lushnikov@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Review-Url: https://codereview.chromium.org/2217263003
Cr-Commit-Position: refs/heads/master@{#410190}

[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/blink/web_content_layer_impl.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/blink/web_display_item_list_impl.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/debug/rasterize_and_record_benchmark.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/debug/rasterize_and_record_benchmark.h
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/layers/empty_content_layer_client.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/layers/picture_image_layer.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/layers/picture_layer_impl_unittest.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/playback/discardable_image_map_unittest.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/playback/display_item_list.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/playback/display_item_list.h
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/playback/display_item_list_unittest.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/playback/recording_source.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/proto/display_item.proto
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/test/fake_content_layer_client.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/test/skia_common.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/test/solid_color_content_layer_client.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/trees/layer_tree_host_pixeltest_masks.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/cc/trees/layer_tree_host_pixeltest_tiles.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/third_party/WebKit/LayoutTests/TestExpectations
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/third_party/WebKit/Source/platform/graphics/compositing/PaintArtifactCompositor.cpp
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/ui/compositor/canvas_painter.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/ui/compositor/layer.cc
[modify] https://crrev.com/490867260447e9360b52d5c03417b000490332e0/ui/views/view_unittest.cc