iOSSampleApp can now switch backends during runtime


git-svn-id: http://skia.googlecode.com/svn/trunk@1897 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/experimental/iOSSampleApp/Shared/SkUIDetailViewController.mm b/experimental/iOSSampleApp/Shared/SkUIDetailViewController.mm
index 17e0ec2..c0f4990 100644
--- a/experimental/iOSSampleApp/Shared/SkUIDetailViewController.mm
+++ b/experimental/iOSSampleApp/Shared/SkUIDetailViewController.mm
@@ -99,7 +99,7 @@
     printInfo.duplex = UIPrintInfoDuplexLongEdge;
     printInfo.outputType = UIPrintInfoOutputGeneral;
     fWind->saveToPdf();
-    [self.view drawRect:self.view.bounds];
+    [fSkUIView forceRedraw];
     fData = fWind->getPDFData();
     NSData* data = [NSData dataWithBytesNoCopy:(void*)fData->data() length:fData->size()];
     controller.printInfo = printInfo;