Unreviewed, rolling out r120329, r121113, and r121138.

Unreviewed, rolling out r120329, r121113, and r121138.
http://trac.webkit.org/changeset/120329
http://trac.webkit.org/changeset/121113
http://trac.webkit.org/changeset/121138
https://bugs.webkit.org/show_bug.cgi?id=90368

Introduced noticeable keyboard-related spins due to
synchronous IPC. (Requested by kling on #webkit).

Patch by Sheriff Bot <webkit.review.bot@gmail.com> on 2012-07-02

* UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::handleKeyboardEvent):
(WebKit::WebPageProxy::didReceiveEvent):
* UIProcess/WebPageProxy.h:
(WebPageProxy):
* UIProcess/WebPageProxy.messages.in:
* WebProcess/WebPage/WebPage.cpp:
(WebKit::WebPage::keyEvent):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@121665 268f45cc-cd09-0410-ab3c-d52691b4dbfc