commit c36508a349b4bff18c73f2e2e2b46805ad091598
author Fredrik Söderquist <fs@opera.com> Mon Jan 22 19:01:26 2018
committer Commit Bot <commit-bot@chromium.org> Mon Jan 22 19:01:26 2018
tree 9b2ca49d3d4ea0595b34acfb2096c1dccb841c07
parent 8cca70e6aa09342458f376c886b7689fdff69eac

[CI] DOM-based SVG resource tracking (1/n)

This starts the transition away from tracking SVG resources based on LayoutObjects.
In the new (probably transitional) model, the resources are track via a Resource
object (inner class) on SVGTreeScopeResources. These Resource objects are
IdTargetObservers, meaning that id mutations no longer are tracked via hooks in
SVGElement. The "pending resource handling" mechanism is also moved to the Resource
objects in the form of a "pending clients" set. The old mechanism (i.e
NeedsPendingResourceHandling() and BuildPendingResourcesIfNeeded()) are no longer
needed and hence removed.

Next step will be to eliminate all remaining tracking logic from
LayoutSVGResourceContainer.

Somewhat independently, a new entry point ResourceReferenceChanged is added to
SVGResourcesCache, codifying the sequence that previously involved calls to
ClientStyleChanged and MarkForLayoutAndParentResourceInvalidation.

Bug: 454767, 661598, 769774, 784435
Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: I268f2e2a2a5e2e01f077a6b0a5b6270f668a2a6f
Reviewed-on: https://chromium-review.googlesource.com/689998
Reviewed-by: Stephen Chenney <schenney@chromium.org>
Commit-Queue: Fredrik Söderquist <fs@opera.com>
Cr-Commit-Position: refs/heads/master@{#530930}