Don't copy the Graphics2D when binding a new one. This brings the

ppapi/examples/2d/paint_manager_example.cc

Index: ppapi/examples/2d/paint_manager_example.cc
===================================================================
--- ppapi/examples/2d/paint_manager_example.cc	(revision 89742)
+++ ppapi/examples/2d/paint_manager_example.cc	(working copy)
@@ -73,7 +73,7 @@
   }
 
   // PaintManager::Client implementation.
-  virtual bool OnPaint(pp::Graphics2D&,
+  virtual bool OnPaint(pp::Graphics2D graphics_2d&,
                        const std::vector<pp::Rect>& paint_rects,
                        const pp::Rect& paint_bounds) {
     // Make an image just large enough to hold all dirty rects. We won't
@@ -114,6 +114,7 @@
              square.height(),
              0xFF000000);
 
+    graphics_2d.PaintImageData(updated_image, paint_bounds.point());
     return true;
   }