Move tiling up into SampleWindow.

Now the tiles do not move with the view, and tiling persists when changing slides.

Review URL: https://codereview.appspot.com/6450143

git-svn-id: http://skia.googlecode.com/svn/trunk@5146 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleApp.h b/samplecode/SampleApp.h
index cb4446f..202fe21a 100644
--- a/samplecode/SampleApp.h
+++ b/samplecode/SampleApp.h
@@ -164,6 +164,7 @@
     bool fMeasureFPS;
     SkMSec fMeasureFPS_Time;
     bool fMagnify;
+    SkISize fTileCount;
 
 
     SkOSMenu::TriState fPipeState;  // Mixed uses a tiled pipe