Reviewed by Darin Adler.

    Reviewed by Darin Adler.

        - cleaned up code related to dealing with the "selected frame"; fixes radar bugs 4118830 and 4118820

        * WebView.subproj/WebTextView.m:
        (-[WebTextView resignFirstResponder]):
        call deselectAll here instead of replicating its guts, just for clarity

        * WebView.subproj/WebViewInternal.h:
        eliminated category WebInternal; all of these methods were used only inside WebView.m, so I moved
        them into the existing category WebFileInternal that was declared and implemented in WebView.m

        * WebView.subproj/WebView.m:
        (-[WebView searchFor:direction:caseSensitive:wrap:]):
        updated for name changes. Also, uses new _deselectFrame: to clear the selection if the found
        text is in a different frame.
        (-[WebView pasteboardTypesForSelection]):
        (-[WebView writeSelectionWithPasteboardTypes:toPasteboard:]):
        (-[WebView setSelectedDOMRange:affinity:]):
        (-[WebView selectedDOMRange]):
        (-[WebView selectionAffinity]):
        (-[WebView setTypingStyle:]):
        (-[WebView typingStyle]):
        (-[WebView styleDeclarationWithText:]):
        (-[WebView replaceSelectionWithNode:]):
        (-[WebView replaceSelectionWithText:]):
        (-[WebView replaceSelectionWithMarkupString:]):
        (-[WebView replaceSelectionWithArchive:]):
        (-[WebView deleteSelection]):
        (-[WebView applyStyle:]):
        updated for name changes only

        (-[WebView _frameIsSelected:]):
        new method, returns YES if given frame has a non-zero-length selection
        (-[WebView _deselectFrame:]):
        new method, clears selection from given frame
        (-[WebView _findSelectedFrameStartingFromFrame:]):
        new method, recursive helper used by _findSelectedFrame
        (-[WebView _findSelectedFrame]):
        new method, finds first frame that returns YES for _frameIsSelected, or nil
        (-[WebView _debugCollectSelectedFramesIntoArray:startingFromFrame:]):
        new method, recursive helper used by _debugCheckForMultipleSelectedFrames
        (-[WebView _debugCheckForMultipleSelectedFrames]):
        new method for debugging, fires an assertion if there's more than one selected frame.
        (-[WebView _selectedOrMainFrame]):
        renamed from _frameForCurrentSelection, which was a misleading name since the returned
        frame does not necessarily have a selection (or even focus). Now checks for a selected
        but non-focused frame if the first responder is not in any frame. Also, moved in file
        from WebInternal category to WebFileInternal category.
        (-[WebView _bridgeForSelectedOrMainFrame]):
        renamed from _bridgeForCurrentSelection, which was a misleading name for the same
        reasons as _frameForCurrentSelection. Also, moved in file from WebInternal category to
        WebFileInternal category.
        (-[WebView _isLoading]):
        (-[WebView _frameViewAtWindowPoint:]):
        (-[WebView _bridgeAtPoint:]):
        just moved in file from WebInternal category to WebFileInternal category

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@9839 268f45cc-cd09-0410-ab3c-d52691b4dbfc