Implement flick gesture in Chromium Gesture Recognizer

 Implement flick gesture in Chromium Gesture Recognizer
 https://bugs.webkit.org/show_bug.cgi?id=67930

 Reviewed by Dimitri Glazkov.

 Test: Source/WebKit/chromium/tests/InnerGestureRecognizerTest.cpp

 * platform/chromium/GestureRecognizerChromium.cpp:
 (WebCore::GestureRecognizerChromium::isOverMinFlickSpeed):
 (WebCore::GestureRecognizerChromium::appendScrollGestureEnd):
 (WebCore::GestureRecognizerChromium::updateValues):
 (WebCore::GestureRecognizerChromium::scrollEnd):
 * platform/chromium/GestureRecognizerChromium.h:

Patch by Varun Jain <varunjain@google.com> on 2011-09-29

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@96365 268f45cc-cd09-0410-ab3c-d52691b4dbfc