make SkDevice constructors explicit between offscreen and on/direct

http://codereview.appspot.com/4632044/



git-svn-id: http://skia.googlecode.com/svn/trunk@1620 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleTextureDomain.cpp b/samplecode/SampleTextureDomain.cpp
index be000f9..37f584e 100755
--- a/samplecode/SampleTextureDomain.cpp
+++ b/samplecode/SampleTextureDomain.cpp
@@ -55,7 +55,7 @@
         // when copying from one GPU device to another.
         SkRefPtr<SkDevice> primaryDevice(canvas->getDevice());
         SkRefPtr<SkDevice> secondDevice(canvas->createDevice(
-                SkBitmap::kARGB_8888_Config, 5, 5, true, true));
+                SkBitmap::kARGB_8888_Config, 5, 5, true));
         secondDevice->unref();
         SkCanvas secondCanvas(secondDevice.get());