Merge 58829 - Reviewed by Adele Peterson....

Merge 58829 - Reviewed by Adele Peterson.

        https://bugs.webkit.org/show_bug.cgi?id=26824
        <rdar://problem/7018610> EventHandler can operate on a wrong frame if focus changes during
        keyboard event dispatch.

        EventHandler object is tied to a frame, so it's wrong for it to continue processing a keyboard
        event if focused frame changes between keydown and keypress.

        * manualtests/focuschangebetweenkeyevents.html: Added.

        * page/EventHandler.cpp: (WebCore::EventHandler::keyEvent): Bail out early if focused frame
        changes while dispatching keydown. Also made similar changes for Windows to maintain matching
        behavior, even though EventHandler was reentered anyway due to WM_KEYDOWN and WM_CHAR being
        separate events.


BUG=15766
TBR=ap@apple.com

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=48067