DevTools: skip edit-dom-actions while I am unflaking it.

TBR=apavlov
NOTRY=true

Review URL: https://codereview.chromium.org/619053002

git-svn-id: svn://svn.chromium.org/blink/trunk@183041 bbb929c8-8fbe-4397-9dbb-9b2b20218538
WTF: we need to initialize EcmaScriptConverter of DoubleToStringConverter in single thread mode.

It can't be converted into a global variable because -Wglobal-constructors compiler error. So the simplest way is to force the creation from the single thread mode. Otherwise we may get a race. See the bug.

BUG=418300

Review URL: https://codereview.chromium.org/612893002

git-svn-id: svn://svn.chromium.org/blink/trunk@183042 bbb929c8-8fbe-4397-9dbb-9b2b20218538