always use grcontext to get the bits to the screen



git-svn-id: http://skia.googlecode.com/svn/trunk@1802 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleApp.h b/samplecode/SampleApp.h
index 515a27d..9b47b8e 100644
--- a/samplecode/SampleApp.h
+++ b/samplecode/SampleApp.h
@@ -27,10 +27,10 @@
 #include "SkWindow.h"
 
 class GrContext;
+class GrRenderTarget;
 
 class SkEvent;
 class SkCanvas;
-class SkGpuCanvas;
 class SkPicture;
 class SkTypeface;
 class SkData;
@@ -90,8 +90,8 @@
     int fCurrIndex;
 
     SkPicture* fPicture;
-    SkGpuCanvas* fGpuCanvas;
     GrContext* fGrContext;
+    GrRenderTarget* fGrRenderTarget;
     SkPath fClipPath;
 
     SkTouchGesture fGesture;