Implement SetViewContents in the client lib

mojo/services/public/cpp/view_manager/view.h

Index: mojo/services/public/cpp/view_manager/view.h
diff --git a/mojo/services/public/cpp/view_manager/view.h b/mojo/services/public/cpp/view_manager/view.h
index 40d660f02935f6c425f8b9c0c25de3d71c3eb10f..c4e61b8c43b9d318402cc1f6e030b76b1f0c2037 100644
--- a/mojo/services/public/cpp/view_manager/view.h
+++ b/mojo/services/public/cpp/view_manager/view.h
@@ -9,6 +9,8 @@
 #include "base/observer_list.h"
 #include "mojo/services/public/cpp/view_manager/view_manager_types.h"
 
+class SkBitmap;
+
 namespace mojo {
 namespace view_manager {
 
@@ -29,6 +31,8 @@ class View {
   void AddObserver(ViewObserver* observer);
   void RemoveObserver(ViewObserver* observer);
 
+  void SetContents(const SkBitmap& contents);
+
  private:
   friend class ViewPrivate;