Merge 138893

Merge 138893
> Add function to move caret selection towards a point
> https://bugs.webkit.org/show_bug.cgi?id=105189
> 
> Patch by Chris Hopman <cjhopman@google.com>; on 2013-01-05
> Reviewed by Eric Seidel.
> 
> This function moves the selection to the corresponding point in the
> rootEditableElement of the current selection. Used on Android for
> the behavior of insertion handles (i.e. dragging the caret around).
> 
> * public/WebFrame.h:
> (WebFrame):
> * src/WebFrameImpl.cpp:
> (WebKit::WebFrameImpl::moveCaretSelectionTowardsWindowPoint):
> (WebKit):
> * src/WebFrameImpl.h:
> (WebFrameImpl):

TBR=commit-queue@webkit.org
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=139813