update example

experimental/SkiaExamples/HelloSkiaExample.cpp

Index: experimental/SkiaExamples/HelloSkiaExample.cpp
diff --git a/experimental/SkiaExamples/HelloSkiaExample.cpp b/experimental/SkiaExamples/HelloSkiaExample.cpp
index 6fd2624c18b0e5e97f9f3ff69b5abfe716f6cbce..6efb9c803bf15325adad049e4ef53bf387b7a05f 100644
--- a/experimental/SkiaExamples/HelloSkiaExample.cpp
+++ b/experimental/SkiaExamples/HelloSkiaExample.cpp
@@ -9,10 +9,8 @@
 
 #include "SkExample.h"
 
-#include "SkApplication.h"
-#include "SkDraw.h"
+#include "SkCanvas.h"
 #include "SkGradientShader.h"
-#include "SkGraphics.h"
 
 class HelloSkia : public SkExample {
 public:
@@ -20,10 +18,6 @@ public:
         fName = "HelloSkia";
         fBGColor = SK_ColorWHITE;
         fRotationAngle = SkIntToScalar(0);
-
-        fWindow->setupBackend(SkExampleWindow::kGPU_DeviceType);
-        // Another option is software rendering:
-        // fWindow->setupBackend(SkExampleWindow::kRaster_DeviceType);
     }
 
 protected: