replace detach/getStream apis on dynamicwstream with SkData

http://codereview.appspot.com/4657046/



git-svn-id: http://skia.googlecode.com/svn/trunk@1714 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleApp.cpp b/samplecode/SampleApp.cpp
index 74a0708..1464fe7 100644
--- a/samplecode/SampleApp.cpp
+++ b/samplecode/SampleApp.cpp
@@ -1,5 +1,6 @@
 #include "SampleApp.h"
 
+#include "SkData.h"
 #include "SkCanvas.h"
 #include "SkDevice.h"
 #include "SkGpuCanvas.h"
@@ -827,7 +828,8 @@
                 fPicture->serialize(&ostream);
                 fPicture->unref();
 
-                SkMemoryStream istream(ostream.getStream(), ostream.getOffset());
+                SkAutoDataUnref data(ostream.copyToData());
+                SkMemoryStream istream(data.data(), data.size());
                 SkPicture pict(&istream);
                 orig->drawPicture(pict);
             } else {