Reviewed by Adam Barth.

        Move allowSetting{Frame}SrcToJavascriptUrl from V8Custom to BindingSecurity and
        remove the v8-specific pieces.

        https://bugs.webkit.org/show_bug.cgi?id=33182

        * bindings/BindingSecurity.h:
        (WebCore::::allowSettingFrameSrcToJavascriptUrl): Moved from V8CustomBinding.cpp.
        (WebCore::::allowSettingSrcToJavascriptURL): Moved from V8CustomBinding.cpp.
        * bindings/v8/custom/V8AttrCustom.cpp:
        (WebCore::V8Attr::valueAccessorSetter):
        * bindings/v8/custom/V8CustomBinding.cpp:
        * bindings/v8/custom/V8CustomBinding.h:
        * bindings/v8/custom/V8ElementCustom.cpp:
        (WebCore::V8Element::setAttributeCallback):
        (WebCore::V8Element::setAttributeNodeCallback):
        (WebCore::V8Element::setAttributeNSCallback):
        (WebCore::V8Element::setAttributeNodeNSCallback):
        * bindings/v8/custom/V8HTMLFrameElementCustom.cpp:
        (WebCore::V8HTMLFrameElement::srcAccessorSetter):
        (WebCore::V8HTMLFrameElement::locationAccessorSetter):
        * bindings/v8/custom/V8HTMLIFrameElementCustom.cpp:
        (WebCore::V8HTMLIFrameElement::srcAccessorSetter):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@52812 268f45cc-cd09-0410-ab3c-d52691b4dbfc