DevTools: Remove an obsolete SettingChanged histogram

BUG=

Review URL: https://codereview.chromium.org/178063004

git-svn-id: svn://svn.chromium.org/blink/trunk@168138 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for r167942

http://src.chromium.org/viewvc/blink?view=revision&revision=167942

TBR=alokp@chromium.org

Review URL: https://codereview.chromium.org/184583003

git-svn-id: svn://svn.chromium.org/blink/trunk@168139 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for r168027

http://src.chromium.org/viewvc/blink?view=revision&revision=168027

BUG=344497,341448
TBR=fmalita@chromium.org

Review URL: https://codereview.chromium.org/184503003

git-svn-id: svn://svn.chromium.org/blink/trunk@168140 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Oilpan: add missing Event-related USED_FROM_MULTIPLE_THREADS() decls.

ErrorEvent and ProgressEvent are available in Worker contexts.

R=wibling@chromium.org
BUG=340522

Review URL: https://codereview.chromium.org/184413003

git-svn-id: svn://svn.chromium.org/blink/trunk@168141 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Automatically determine if a struct/class needs tracing.

This is an alternate automatic way to determine if a class or struct needs to be traced based on it having a method with the signature
"void trace(Visitor*)".

It is not a beauty, but it will avoid us having to specialize the NeedsTracing trait for structs being used in collections, such as CSSGradientColorStop.

R=ager@chromium.org, erik.corry@gmail.com, haraken@chromium.org, jochen@chromium.org, oilpan-reviews@chromium.org, tkent@chromium.org, vegorov@chromium.org, zerny@chromium.org
BUG=

Review URL: https://codereview.chromium.org/179943003

git-svn-id: svn://svn.chromium.org/blink/trunk@168143 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Auto-rebaseline for r167949

http://src.chromium.org/viewvc/blink?view=revision&revision=167949

BUG=302005
TBR=pdr@chromium.org

Review URL: https://codereview.chromium.org/184673003

git-svn-id: svn://svn.chromium.org/blink/trunk@168144 bbb929c8-8fbe-4397-9dbb-9b2b20218538
Rebase fragmented-control-frame.html

The console message in the fragmented-control-frame.html layout test has
changed in the new WebSocket implementation. Update the expectations to
match.

BUG=339373

Review URL: https://codereview.chromium.org/177503002

git-svn-id: svn://svn.chromium.org/blink/trunk@168145 bbb929c8-8fbe-4397-9dbb-9b2b20218538