Source/WebKit/gtk/WebCoreSupport/DumpRenderTreeSupportGtk.cpp
void DumpRenderTreeSupportGtk::addUserStyleSheet(WebKitWebFrame* frame, const char* sourceCode, bool allFrames)
{
    g_return_if_fail(WEBKIT_IS_WEB_FRAME(frame));

    Frame* coreFrame = core(frame);
    if (!coreFrame)
        return;

    WebKitWebView* webView = getViewFromFrame(frame);
    Page* page = core(webView);
    page->group().addUserStyleSheetToWorld(mainThreadNormalWorld(), sourceCode, KURL(), 0, 0, allFrames ? InjectInAllFrames : InjectInTopFrameOnly); 
}
/**
 * addUserStyleSheet
 * @frame: a #WebKitWebFrame
 * @sourceCode: code of a user stylesheet
 *
 */
addUserStyleSheet
@frame: a #WebKitWebFrame
@sourceCode: code of a user stylesheet
addUserStyleSheet @frame : a #WebKitWebFrame @sourceCode : code of a user stylesheet
void DumpRenderTreeSupportGtk::addUserStyleSheet(WebKitWebFrame* frame, const char* sourceCode, bool allFrames)
{
    g_return_if_fail(WEBKIT_IS_WEB_FRAME(frame));
    Frame* coreFrame = core(frame);
    if (!coreFrame)
        return;
    WebKitWebView* webView = getViewFromFrame(frame);
    Page* page = core(webView);
    page->group().addUserStyleSheetToWorld(mainThreadNormalWorld(), sourceCode, KURL(), 0, 0, allFrames ? InjectInAllFrames : InjectInTopFrameOnly); 
}
void DumpRenderTreeSupportGtk :: addUserStyleSheet ( WebKitWebFrame * frame , const char * sourceCode , bool allFrames ) { g_return_if_fail ( WEBKIT_IS_WEB_FRAME ( frame ) ) ; Frame * coreFrame = core ( frame ) ; if ( ! coreFrame ) return ; WebKitWebView * webView = getViewFromFrame ( frame ) ; Page * page = core ( webView ) ; page -> group ( ) . addUserStyleSheetToWorld ( mainThreadNormalWorld ( ) , sourceCode , KURL ( ) , 0 , 0 , allFrames ? InjectInAllFrames : InjectInTopFrameOnly ) ; }
addUserStyleSheet
 @frame: a #WebKitWebFrame
 @sourceCode: code of a user stylesheet
addUserStyleSheet @frame : a #WebKitWebFrame @sourceCode : code of a user stylesheet