Reviewed, landed, tweaked a bit by Darin.

    Reviewed, landed, tweaked a bit by Darin.

        - removed most uses of WebFrameBridge from WebFrameLoader
          (WebCoreFrameBridge use is OK)

        * Loader/WebDocumentLoader.m:
        (-[WebDocumentLoader bridge]):
        * Loader/WebFrameLoader.h:
        * Loader/WebFrameLoader.m:
        (-[WebFrameLoader initWithFrame:client:]):
        (-[WebFrameLoader defersCallbacksChanged]):
        (-[WebFrameLoader defersCallbacks]):
        (-[WebFrameLoader provisionalLoadStarted]):
        (-[WebFrameLoader stopLoadingSubframes]):
        (-[WebFrameLoader _willSendRequest:forResource:redirectResponse:]):
        (-[WebFrameLoader _receivedMainResourceError:complete:]):
        (-[WebFrameLoader loadURL:referrer:loadType:target:triggeringEvent:form:formValues:]):
        (-[WebFrameLoader continueFragmentScrollAfterNavigationPolicy:formState:]):
        (-[WebFrameLoader closeOldDataSources]):
        (-[WebFrameLoader commitProvisionalLoad:]):
        (-[WebFrameLoader bridge]):
        (-[WebFrameLoader _handleFallbackContent]):
        (-[WebFrameLoader _finishedLoading]):
        (-[WebFrameLoader reload]):
        (-[WebFrameLoader checkNavigationPolicyForRequest:documentLoader:formState:andCall:withSelector:]):
        (-[WebFrameLoader continueLoadRequestAfterNavigationPolicy:formState:]):
        (-[WebFrameLoader transitionToCommitted:]):
        (-[WebFrameLoader continueLoadRequestAfterNewWindowPolicy:frameName:formState:]):
        (-[WebFrameLoader loadRequest:inFrameNamed:]):
        (-[WebFrameLoader postWithURL:referrer:target:data:contentType:triggeringEvent:form:formValues:]):
        (-[WebFrameLoader detachFromParent]):
        (-[WebFrameLoader addExtraFieldsToRequest:mainResource:alwaysFromRequest:]):
        (-[WebFrameLoader safeLoadURL:]):
        (-[WebFrameLoader actionInformationForLoadType:isFormSubmission:event:originalURL:]):
        * WebCoreSupport/WebFrameBridge.m:
        (-[WebFrameBridge initMainFrameWithPage:frameName:view:]):
        (-[WebFrameBridge initSubframeWithOwnerElement:frameName:view:]):
        * WebView/WebFrame.m:
        (-[WebFrame _atMostOneFrameHasSelection]):
        * WebView/WebFrameInternal.h:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@16931 268f45cc-cd09-0410-ab3c-d52691b4dbfc