Empty rects don't bleed

This is a trivial patch to not inflate empty rects for bleed avoidance.

Review URL: https://codereview.chromium.org/213833006

git-svn-id: svn://svn.chromium.org/blink/trunk@170448 bbb929c8-8fbe-4397-9dbb-9b2b20218538
[DevTools] Resize FilteredItemSelectionDialog to be always visible.

BUG=358112

Review URL: https://codereview.chromium.org/218733004

git-svn-id: svn://svn.chromium.org/blink/trunk@170450 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Smaller CSSParser UTF16 buffers for escaped strings.

If an ASCII stylesheet contains escaped characters those need to be
unescaped and stored somewhere. The code used to allocate a buffer the
size of the whole CSS file * sizeof(UChar). That meant 700 KB on
arstechnica.com to store a single character. Instead store the
supposedly rare characters in special buffers of appropriate sizes.

BUG=352544

Review URL: https://codereview.chromium.org/196353018

git-svn-id: svn://svn.chromium.org/blink/trunk@170451 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: promote CodeMirror scrollbars to a discrete rendering layer

This patch is a workaround for compositing bug observed on MacBook Pro
with retina display.

BUG=358161

Review URL: https://codereview.chromium.org/219413003

git-svn-id: svn://svn.chromium.org/blink/trunk@170452 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: [wip] move Elements panel off WebInspector.domModel and single tree outline.

R=sergeyv@chromium.org

Review URL: https://codereview.chromium.org/218703002

git-svn-id: svn://svn.chromium.org/blink/trunk@170453 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Define push_messaging module with PushManager skeleton.

Intent to implement thread:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/GLXyXABvA_0

BUG=350378

Review URL: https://codereview.chromium.org/213013006

git-svn-id: svn://svn.chromium.org/blink/trunk@170454 bbb929c8-8fbe-4397-9dbb-9b2b20218538