Reviewed by Maciej.

    Reviewed by Maciej.

        - fixed problems preventing us from compiling with gcc 4.0

        * WebKit.pbproj/project.pbxproj: Removed -fobjc-exceptions because I can't figure out an easy
        way to pass it only when compiling Objective-C/C++. Removed -Wmissing-prototypes from
        WARNING_CPLUSPLUSFLAGS since it's now a C-only warning.

        * History.subproj/WebHistoryItem.m: (-[WebHistoryItem pageCache]): Changed return type
        to match the declaration.
        * WebCoreSupport.subproj/WebBridge.m: (-[WebBridge _retrieveKeyboardUIModeFromPreferences:]):
        Fixed a BOOL that should have been a Boolean.
        * WebCoreSupport.subproj/WebTextRenderer.m: Removed redundant copy of ROUND_TO_INT, also in
        a WebCore header.
        (-[WebTextRenderer _computeWidthForSpace]): Had to add cast because of difference in type of
        ROUND_TO_INT vs. CEIL_TO_INT.
        (pathFromFont): Added a cast to convert UInt8 * to char *.
        * WebView.subproj/WebFrameView.m:
        (-[WebFrameView _setDocumentView:]): Fixed parameter type to match the declaration.
        (-[WebFrameView documentView]): Fixed return type to match the declaration.
        * WebView.subproj/WebHTMLView.m:
        (-[WebHTMLView _startDraggingImage:at:operation:event:sourceIsDHTML:DHTMLWroteData:]):
        Initialized a variable to quiet an incorrect gcc 4.0 uninitialized variable warning.
        (-[WebHTMLView deleteToMark:]): Switched from @try style to NS_DURING style of exception handler
        because we can't pass -fobjc-exceptions just to Objective-C at the moment (see above).
        (-[WebHTMLView selectToMark:]): Ditto.
        (-[WebHTMLView swapWithMark:]): Ditto.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@9080 268f45cc-cd09-0410-ab3c-d52691b4dbfc