Fix for 4077106, wheel scroll amount smaller in Tiger. All along wheeling should...

	Fix for 4077106, wheel scroll amount smaller in Tiger.  All along wheeling should have been 4x the default
	line height of 10 (just as arrow keys did).  Scroll arrows should have done this too for scroll views (they did
	already for overflow sections).  This patch puts the override into the scrollview itself, and removes the
	multipliers in the private frame methods.

        Reviewed by darin

        * WebView.subproj/WebFrameView.m:
        (-[WebFrameView _verticalKeyboardScrollDistance]):
        (-[WebFrameView initWithFrame:]):
        (-[WebFrameView _horizontalKeyboardScrollDistance]):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@8993 268f45cc-cd09-0410-ab3c-d52691b4dbfc