Remove CRs from inner-svg-change-viewBox-contract

This is a commit to make https://codereview.chromium.org/205263004/
apply cleanly.

TBR=jamesr@chromium.org
BUG=345027

Review URL: https://codereview.chromium.org/215353003

git-svn-id: svn://svn.chromium.org/blink/trunk@170208 bbb929c8-8fbe-4397-9dbb-9b2b20218538
MSE: Update WebM buffered range expectations w.r.t. frame duration processing

Chromium-side changes to parse and use optional WebM TrackEntry
DefaultDuration, derive simpleblock frame durations from subsequent
frame duration, or estimate missing frame duration as the maximum
duration seen so far cause changes in mediasource buffered range tests.

This change updates the tests relative to the new WebM frame duration
parsing/derivation/defaulting.

Also includes TestExpectations update to allow these tests to fail until Chromium side lands.

BUG=351166
TBR=acolwell@chromium.org
TEST=All media layout tests pass locally on Linux (with the Chromium prereq CLs applied), and failure is allowed by TestExpectations (without the prereq CLs applied)

Review URL: https://codereview.chromium.org/212593007

git-svn-id: svn://svn.chromium.org/blink/trunk@170209 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Remove support for custom pseudo elements.

This is a revert of https://src.chromium.org/viewvc/blink?view=rev&revision=168627.

BUG=254020

Review URL: https://codereview.chromium.org/215173003

git-svn-id: svn://svn.chromium.org/blink/trunk@170210 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add Traversal<*Element>::firstAncestor() API

Add Traversal<*Element>::firstAncestor() API to traverse elements of a specific
type. It is a common pattern in our code base to traverse the ancestors of a
Node until we find an Element of a specific type. This new firstAncestor() API
makes the code much simpler. This CL already makes use of the new API in
several places.

R=esprehn, eseidel
BUG=346733

Review URL: https://codereview.chromium.org/201293002

git-svn-id: svn://svn.chromium.org/blink/trunk@170211 bbb929c8-8fbe-4397-9dbb-9b2b20218538