chromedriver doesn't allow changing Object.prototype to add enumerable
properties, but this test requires setting some values on
Object.prototype.  When Object.prototype.a is set to:

  {b: {c: 'on proto'}}

chromedriver fails with:

    JavascriptErrorException: javascript error (500): Maximum call stack size exceeded
      (Session info: chrome=72.0.3626.121)

    Remote-end stacktrace:

    #0 0x563ff3a32a59 <unknown>
    #1 0x563ff39cb7f3 <unknown>
    #2 0x563ff38fcd7c <unknown>
    #3 0x563ff38ff78c <unknown>
    #4 0x563ff38ff5f7 <unknown>
    #5 0x563ff38ffbe7 <unknown>
    #6 0x563ff38fff1b <unknown>
    #7 0x563ff38a3f7a <unknown>
    #8 0x563ff3899bf2 <unknown>
    #9 0x563ff38a37b7 <unknown>
    #10 0x563ff3899ac3 <unknown>
    #11 0x563ff38782d2 <unknown>
    #12 0x563ff3879112 <unknown>
    #13 0x563ff39fe865 <unknown>
    #14 0x563ff39ff32b <unknown>
    #15 0x563ff39ff70c <unknown>
    #16 0x563ff39d940a <unknown>
    #17 0x563ff39ff997 <unknown>
    #18 0x563ff39e9947 <unknown>
    #19 0x563ff3a1a800 <unknown>
    #20 0x563ff3a3c8be <unknown>
    #21 0x7f3bf4545494 start_thread
    #22 0x7f3bf2d58a8f clone

    Ran 1 tests finished in 2.0 seconds.
      • 0 ran as expected. 0 tests skipped.
      • 1 tests had errors unexpectedly

Work around this problem by cleaning up the test environment so
Object.prototype no longer has the override by the time chromedriver
tries to inspect the test result.

While here, fix the other tests to use the t.add_cleanup() function
so they'll cleanup their test environment in case they exit in
some other way besides reaching t.done().

The underlying chromedriver issue is tracked upstream at
https://crbug.com/chromedriver/2555.

Bug: 934844
Change-Id: Id1b4ab2a908bfbc001e2a2d045eeec3ef01c24d9

This reverts commit 3438f2a59daa31ad1d86777d73e1cff836cef570.

Reason for revert: Suspect causing blink_wpt_tests and blink_web_tests failure on Linux Tests (dbg)(1) bot.

Failed tests:
blink_wpt_tests failed because of:
external/wpt/css/css-contain/content-visibility/detach-locked-slot-children-crash.html
external/wpt/css/css-contain/content-visibility/element-reassigned-to-skipped-slot.html
external/wpt/css/css-contain/content-visibility/element-reassigned-to-slot-in-skipped-subtree.html
external/wpt/html/semantics/forms/the-input-element/focus-dynamic-type-change-on-blur.html
...7 more failure(s) (11 total)...

blink_web_tests failed because of:
accessibility/details-summary-crash.html
fast/events/drag-on-removed-slider-does-not-crash.html
fast/forms/range/range-type-change-onchange-2.html
html/details_summary/details-add-summary.html
...5 more failure(s) (9 total)...

First build failure:
https://ci.chromium.org/ui/p/chromium/builders/ci/Linux%20Tests%20(dbg)(1)/114032/overview

Sample log:
---
STDERR: #6 0x7fc01bd0361d logging::CheckError::~CheckError()
STDERR: #7 0x7fbffd21d08a blink::FlatTreeTraversal::AssertPrecondition()
STDERR: #8 0x7fbffd21cfd5 blink::FlatTreeTraversal::Parent()
STDERR: #9 0x7fbffd3c2a45 blink::FlatTreeTraversal::AncestorsOf()
STDERR: #10 0x7fbffd3d410e blink::(anonymous namespace)::NearestLockedExclusiveAncestor()
STDERR: #11 0x7fbffd3d3d17 blink::DisplayLockUtilities::IsInUnlockedOrActivatableSubtree()
STDERR: #12 0x7fbfedfabc4b blink::DisplayLockUtilities::ShouldIgnoreNodeDueToDisplayLock()
STDERR: #13 0x7fbfedf8b61c blink::AXObject::ToString()
STDERR: #14 0x7fbfedf8eccc blink::AXObject::Detach()
STDERR: #15 0x7fbfedf512df blink::AXNodeObject::Detach()
STDERR: #16 0x7fbfedf2d6a5 blink::AXLayoutObject::Detach()
STDERR: #17 0x7fbfedfce51a blink::AXObjectCacheImpl::Remove()
STDERR: #18 0x7fbfedfcd998 blink::AXObjectCacheImpl::Remove()
STDERR: #19 0x7fbfedfcdd74 blink::AXObjectCacheImpl::Remove()
STDERR: #20 0x7fbfedfce992 blink::AXObjectCacheImpl::Remove()
STDERR: #21 0x7fbffe6d16be blink::LayoutObject::WillBeDestroyed()
---

Original change's description:
> [A11y] Reland targeted cached property invalidation
>
> Relands the following CLS:
> * Enhance performance by targeting value updates to specific nodes, commit 704633e6846e44b20c488a3eb98fa43c2c8e4591.
> * Don't queue anything for irrelevant attribute changes, commit 2c66a62ed62e601b7a81271e4be4f9e173ce9afc.
> * Add comment explaining call to UpdateStyleAndLayoutTreeForNode(), commit 73b9eed3b48bc8ce70de657672755f44a89e7358.
> * Ensure cached values not invalidated during the computation of them, commit 4d167a62cd13d5209ecefb664e3690ac955bc559.
> * Run a test with --force-renderer-accessibility that used to fail, commit cab7ecd829b24acf677e02f8f118085eaad7f799.
> * Simplify code to update cached focusable state, commit 79cb184e5dab5f6084ec78d485bd9496eaa0aaf8.
> * Simplify code that invalidates cached values on an AXObject, commit 6df79a50a55fe5cf99d2c50f7308e1236361b771.
>
> Fixed: 1446864, 1446550, 1434555, 1362758
> Change-Id: I16855bdcb746cb41387b69e1e97ab72ffc47e342
> Cq-Do-Not-Cancel-Tryjobs: true
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4545510
> Commit-Queue: Aaron Leventhal <aleventhal@chromium.org>
> Reviewed-by: Jacques Newman <janewman@microsoft.com>
> Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
> Reviewed-by: Philip Rogers <pdr@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1157878}

Change-Id: Iefe59fe1933747346eda8827fd683f310d6cddb3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4615927
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Owners-Override: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Auto-Submit: Takashi Sakamoto <tasak@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1157993}

Since @page border box layout objects aren't in the the layout tree, any
code that wants to walk up the tree to find the containing block will be
in for a surprise.

This would happen if percentage-based @page padding was used [1].
Recomputing padding during painting when we have already done it during
layout is rather pointless anyway. Read it out directly from the
fragment.

[1] #1 blink::LayoutBox::ContainingBlockLogicalWidthForContent()
    #2 blink::LayoutBoxModelObject::ComputedCSSPadding()
    #3 blink::LayoutBoxModelObject::PaddingTop()
    #4 blink::LayoutBoxModelObject::PaddingOutsets()
    #5 blink::BoxPainterBase::PaintFillLayer()
    #6 blink::BoxPainterBase::PaintFillLayers()
    #7 blink::BoxFragmentPainter::PaintBackground()

Bug: 40286153
Change-Id: I1e6e92c2ce1d81aab2673ec9a877eac455534102
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5526469
Commit-Queue: Morten Stenshorne <mstensho@chromium.org>
Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1300711}