Window/iframe context switcher is broken for some iframes.

Frame crafting shouldn't turn to "FrameNavigated" event,
because this event resets execution contexts list.

BUG=319931

Review URL: https://codereview.chromium.org/80713002

git-svn-id: svn://svn.chromium.org/blink/trunk@163542 bbb929c8-8fbe-4397-9dbb-9b2b20218538
DevTools: [JsDoc] Add a basic presubmit check for object types without explicit nullability

Drive-by: fix missed and recently added failures

R=aandrey@chromium.org, yurys@chromium.org, aandrey, eustas, vsevik, yurys
BUG=324831

Review URL: https://codereview.chromium.org/110323003

git-svn-id: svn://svn.chromium.org/blink/trunk@163543 bbb929c8-8fbe-4397-9dbb-9b2b20218538