https://bugs.webkit.org/show_bug.cgi?id=57260
        Clean up text input code a little

WebKit/mac:
        * WebCoreSupport/WebEditorClient.mm:
        (WebEditorClient::handleKeyboardEvent):
        (WebEditorClient::handleInputMethodKeydown):
        * WebView/WebHTMLViewInternal.h:
        Renamed _interceptEditingKeyEvent:shouldSaveCommand:, becasue it doesn't really intercept
        anything. It's just a version it interpretKeyEvents: that tells us whether it was handled,
        and also possibly saves resulting commands for later execution.

        * WebView/WebHTMLView.mm:
        (-[WebHTMLView _interpretKeyEvent:savingCommands:]): Changed to use early return. Changed
        return value in case platformEvent is null to be less mysterious. Moved receivedNOOP from
        WebHTMLViewPrivate to WebHTMLViewInterpretKeyEventsParameters, as this is just part of event
        handling state, like the other booleans there. Don't call interpretKeyEvents: again simply
        because the first call resulted in no saved commands, becasue it's confusing and apparently
        useless (I couldn't find any broken behavior).
        (-[WebHTMLView unmarkText]): Cleaned upo BOOL vs. bool constants.
        (-[WebHTMLView setMarkedText:selectedRange:]): Ditto.
        (-[WebHTMLView doCommandBySelector:]): Ditto.
        (-[WebHTMLView insertText:]): Ditto.

        * WebView/WebViewInternal.h: There was no _interceptEditingKeyEvent:shouldSaveCommand:
        method on WebView.

WebKit2:
        * UIProcess/API/mac/WKView.mm:
        (-[WKView doCommandBySelector:]): This NSTextInput protocol method lacked a LOG() call.
        (-[WKView keyDown:]): Added (possibly useless) event protection to match performKeyEquivalent:
        and also WebKit1.

        * WebProcess/WebPage/mac/WebPageMac.mm: Removed an obsolete comment.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@82148 268f45cc-cd09-0410-ab3c-d52691b4dbfc