Unreviewed gardening. More flaky compositing tests.

TBR=rbyers@chromium.org
BUG=339118

Review URL: https://codereview.chromium.org/132123006

git-svn-id: svn://svn.chromium.org/blink/trunk@166043 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Add a UseCounter for the HTMLSourceElement.media IDL attribute

The content attribute no longer does anything, so the IDL attribute
should also be removed as soon as the usage allows.

BUG=338197

Review URL: https://codereview.chromium.org/146483002

git-svn-id: svn://svn.chromium.org/blink/trunk@166044 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Devtools: UMA for InspectElement loading time was added. Blink changes.

BUG=

Review URL: https://codereview.chromium.org/149253007

git-svn-id: svn://svn.chromium.org/blink/trunk@166045 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Unreviewed gardening. More windows baseline problems.

These arrow pixels keep showing up. Odd.

BUG=335472
TBR=tkent@chromium.org,ojan@chromium.org

Review URL: https://codereview.chromium.org/149443006

git-svn-id: svn://svn.chromium.org/blink/trunk@166046 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Revert of Add the GeometricPrecisionDisablesTypesettingFeatures flag (https://codereview.chromium.org/141433027/)

Reason for revert:
Reverting because typesetting features are actually important for readable text. We will need to tackle the performance issue in a different way.

Original issue's description:
> Add the GeometricPrecisionDisablesTypesettingFeatures flag
> 
> This patch adds the runtime enabled feature "GeometricPrecisionDisablesTypesettingFeatures"
> which disables kerning and ligatures for text with text-rendering=
> geometricPrecision. This matches the spec [1]. If there are no major
> regressions we will remove this flag in roughly 6 weeks (~1 release).
> 
> [1] https://svgwg.org/svg2-draft/single-page.html#painting-TextRenderingProperty
> 
> BUG=338870
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=166037

TBR=eae@chromium.org,eae@google.com,leviw@google.com
NOTREECHECKS=true
NOTRY=true
BUG=338870

Review URL: https://codereview.chromium.org/142413011

git-svn-id: svn://svn.chromium.org/blink/trunk@166047 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Unreviewed gardening. Mark Kusa-Makura-background-canvas.html as flaky.

TBR=dglazkov@chromium.org
BUG=339174

Review URL: https://codereview.chromium.org/142413012

git-svn-id: svn://svn.chromium.org/blink/trunk@166048 bbb929c8-8fbe-4397-9dbb-9b2b20218538