Show tracing buffer usage in Timeline 

- add bufferUsageReportingInterval option to Tracing.Start;
- add Tracing.bufferUsage event
- show tracing buffer usage using Timeline progress pane

BUG=

Review URL: https://codereview.chromium.org/224733015

git-svn-id: svn://svn.chromium.org/blink/trunk@171271 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Mark fast/dom/shadow/input-color-in-content.html as crashing on Mac dbg

BUG=362073
TBR=leviw@chromium.org

Review URL: https://codereview.chromium.org/233183003

git-svn-id: svn://svn.chromium.org/blink/trunk@171273 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: Implement a draft of WebInspector.Context

R=pfeldman, vsevik
NOTRY=true

Review URL: https://codereview.chromium.org/233203002

git-svn-id: svn://svn.chromium.org/blink/trunk@171274 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: better address console self-xss.

BUG=345205
R=vsevik@chromium.org

Review URL: https://codereview.chromium.org/232023005

git-svn-id: svn://svn.chromium.org/blink/trunk@171275 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Mark several tests under virtual/windows-directwrite/fast/ as NeedsManualRebaseline after r171226

They started failing with IMAGE diff after r171226.

http://test-results.appspot.com/dashboards/flakiness_dashboard.html#group=%40ToT%20Blink&tests=virtual/windows-directwrite/fast/text/basic/generic-family-reset.html,virtual/windows-directwrite/fast/text/drawBidiText.html,virtual/windows-directwrite/fast/text/international/bidi-listbox-atsui.html,virtual/windows-directwrite/fast/text/international/bidi-listbox.html,virtual/windows-directwrite/fast/text/international/bidi-menulist.html,virtual/windows-directwrite/fast/text/textIteratorNilRenderer.html

BUG=356780
TBR=eae@chromium.org

Review URL: https://codereview.chromium.org/232943004

git-svn-id: svn://svn.chromium.org/blink/trunk@171276 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: make some ConsoleView members private.

R=sergeyv@chromium.org

Review URL: https://codereview.chromium.org/227433016

git-svn-id: svn://svn.chromium.org/blink/trunk@171277 bbb929c8-8fbe-4397-9dbb-9b2b20218538