allow for stepping through a picture with 'n' and 'p'

samplecode/SampleApp.h

Index: samplecode/SampleApp.h
diff --git a/samplecode/SampleApp.h b/samplecode/SampleApp.h
index 32581931100c73e0d5007132e0bc8569c99eee49..97854fcb972170caaf43208a75701e8053f8e3ac 100644
--- a/samplecode/SampleApp.h
+++ b/samplecode/SampleApp.h
@@ -174,6 +174,7 @@ private:
     DeviceManager* fDevManager;
 
     bool fSaveToPdf;
+    bool fSaveToSKP;
     SkAutoTUnref<SkDocument> fPDFDocument;
 
     bool fUseClip;
@@ -218,9 +219,6 @@ private:
     //Stores slide specific settings
     SkOSMenu* fSlideMenu; // We pass ownership to SkWindow, when we call addMenu
 
-    int fTransitionNext;
-    int fTransitionPrev;
-
     void loadView(SkView*);
     void updateTitle();
     bool getRawTitle(SkString*);