Reviewed by Maciej.

        Pulled a number of methods from WebKit and WebCoreFrameBridge into 
        C++ objects.

        * WebCore.exp:
        * WebCore.xcodeproj/project.pbxproj:
        * editing/Editor.cpp:
        (WebCore::Editor::replaceMarkedText):
            From -[WebCoreFrameBridge replaceMarkedTextWithText:]
        * editing/Editor.h:
        * page/Frame.cpp:
        (WebCore::Frame::setMarkedTextRange):
            Pulled platform independent logic from Mac specific implementation
        (WebCore::Frame::selectRangeInMarkedText):
            Converted from -[WebHTMLView _selectRangeInMarkedText:]
        * page/Frame.h:
        * page/mac/FrameMac.mm:
        (WebCore::Frame::setMarkedTextRange):
            Now only does Mac specific logic when manipulating initial
            NSAttributedString
        * page/mac/WebCoreFrameBridge.h:
        * page/mac/WebCoreFrameBridge.mm:
            Removed -[WebCoreFrameBridge replaceMarkedTextWithText:]

WebKit:

        Reviewed by Maciej.

        <rdar://problem/5318756> Need to refactor IM/Marked text code to share logic with windows.

        Moved a number of methods from WebHTMLView into WebCore.
        Replaced bridge methods with calls directly into WebCore objects.

        * WebKit.xcodeproj/project.pbxproj:
        * WebView/WebHTMLView.mm:
        (-[WebHTMLView setMarkedText:selectedRange:]):
          Now calls WebCore object methods directly, rather than calling 
          via the bridge.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@24085 268f45cc-cd09-0410-ab3c-d52691b4dbfc