* Misc.subproj/WebNSViewExtras.h:
        * Misc.subproj/WebNSViewExtras.m:
        (-[NSView _web_dragShouldBeginFromMouseDown:withExpiration:xHysteresis:yHysteresis:]):
	new method
        (-[NSView _web_dragShouldBeginFromMouseDown:withExpiration:]):
	now calls the new method, passing the default hysteresis values

WebBrowser:

	- fixed 3096528 -- don't let initially-horizontal drags of
	toolbar bookmarks escape from toolbar

	Unfortunately I left behind a drawing glitch, recorded as
	bug 3099488. Ideas to fix this are hereby solicited.

        * FavoritesBar.m:
        (-[FavoritesBar slideButtonsIntoPlace]):
	renamed from repositionButtons for clarity
        (-[FavoritesBar maxButtonX]):
	new method, extracted from _layOutButtons
        (-[FavoritesBar _layOutButtons]):
	now calls maxButtonX
        (-[FavoritesBar setDropIndex:]):
	updated for name change
        (-[FavoritesBar specialBookmarkSourcesCount]):
	new method, extracted from duplicated code
        (-[FavoritesBar lastNonFavoriteIndex]):
	new method, extracted from dropIndexFromDraggingInfo:
        (-[FavoritesBar dropIndexFromLocalPoint:]):
	new method, extracted from dropIndexFromDraggingInfo:
        (-[FavoritesBar dropIndexFromDraggingInfo:]):
	now calls dropIndexFromLocalPoint:
        (-[FavoritesBar addDroppedBookmarks:atIndex:]):
	new method, extracted from performDragOperation:
        (-[FavoritesBar performDragOperation:]):
	now calls addDroppedBookmarks:atIndex:
        (-[FavoritesBar _lastDraggedEventFollowing:]),
        (-[FavoritesBar _lastDraggedOrUpEventFollowing:]):
	new methods, cribbed from AppKit
        (-[FavoritesBar constrainProposedButtonFrame:]):
	new method
        (-[FavoritesBar reorderFavoriteButton:fromMouseDownEvent:]):
	new method, drags (but not using CoreDragging stuff) button
	horizontally within bar only

        * FavoritesBarView.h:
	added definition of FavoritesBarReorderingDelegate informal protocol
        * FavoritesBarView.m:
        (-[FavoritesBarView reorderFavoriteButton:fromMouseDownEvent:]):
	pass call through to delegate (FavoritesBar)

        * FavoriteButton.m:
        (-[FavoriteButton currentEventOffsetFromEvent:]):
	new method, extracted from performDragFromEvent:
        (-[FavoriteButton performDragFromEvent:]):
	now calls extracted method
        (-[FavoriteButton canDrag]):
	renamed from canDragButton; now checks whether superview is a
	FavoritesBarView
        (-[FavoriteButton mouseDown:]):
	checks whether initial dragging movement was primarily vertical or
	horizontal; if horizontal, calls new reordering code; if vertical,
	uses larger hysteresis to minimize accidental poofing


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@2642 268f45cc-cd09-0410-ab3c-d52691b4dbfc