- remove use of WebView and related from WebMainResourceLoader

        * WebKit.xcodeproj/project.pbxproj:
        * WebView/WebDataSource.m:
        (+[WebDataSource _generatedMIMETypeForURLScheme:]):
        (+[WebDataSource _representationExistsForURLScheme:]):
        (+[WebDataSource _canShowMIMEType:]):
        (-[WebDataSource _handleFallbackContent]):
        (-[WebDataSource _decidePolicyForMIMEType:decisionListener:]):
        * WebView/WebDataSourceInternal.h:
        * WebView/WebFrame.m:
        (-[WebFrame _isMainFrame]):
        * WebView/WebFrameInternal.h:
        * WebView/WebMainResourceLoader.m:
        (-[WebMainResourceLoader willSendRequest:redirectResponse:]):
        (-[WebMainResourceLoader continueAfterContentPolicy:response:]):
        (-[WebMainResourceLoader checkContentPolicyForResponse:]):
        (-[WebMainResourceLoader loadWithRequestNow:]):
        * WebView/WebView.m:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@14832 268f45cc-cd09-0410-ab3c-d52691b4dbfc