Reviewed by Darin.

    Reviewed by Darin.

	- use WebKitSystemInterface wrappers for NSURLFileTypeMappings and NSURLResponse SPI

        * Misc.subproj/WebNSPasteboardExtras.m:
        (-[NSPasteboard _web_declareAndWriteDragImage:URL:title:archive:source:]):
        * Misc.subproj/WebNSURLExtras.m:
        (-[NSURL _webkit_suggestedFilenameWithMIMEType:]):
        * Misc.subproj/WebNSViewExtras.m:
        (-[NSView _web_dragImage:rect:event:pasteboard:source:offset:]):
        * Plugins.subproj/WebBaseNetscapePluginStream.m:
        (-[WebBaseNetscapePluginStream startStreamWithResponse:]):
        * Plugins.subproj/WebNetscapePluginStream.m:
        (-[WebNetscapePluginConnectionDelegate didReceiveResponse:]):
        * Plugins.subproj/WebPluginDatabase.m:
        (-[WebPluginDatabase pluginForExtension:]):
        * WebCoreSupport.subproj/WebBridge.m:
        (-[WebBridge expiresTimeForResponse:]):
        (-[WebBridge determineObjectFromMIMEType:URL:]):
        (-[WebBridge MIMETypeForPath:]):
        * WebCoreSupport.subproj/WebImageRendererFactory.m:
        (-[WebImageRendererFactory supportedMIMETypes]):
        * WebView.subproj/WebBaseResourceHandleDelegate.m:
        (-[WebBaseResourceHandleDelegate _canUseResourceWithResponse:]):
        * WebView.subproj/WebDataSource.m:
        (-[WebDataSource _commitIfReady:]):
        * WebView.subproj/WebHTMLView.m:
        (-[WebHTMLView _imageExistsAtPaths:]):
        (-[WebHTMLView _documentFragmentWithPaths:]):
        (-[WebHTMLView resourceForData:preferredFilename:]):
        * WebView.subproj/WebMainResourceClient.m:
        * WebView.subproj/WebView.m:
        (+[WebView _supportedFileExtensions]):
        (+[WebView suggestedFileExtensionForMIMEType:]):
        (+[WebView _MIMETypeForFile:]):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@9283 268f45cc-cd09-0410-ab3c-d52691b4dbfc