Fix a memory leak... the wrapped platform helper isn't a view, so it's not au...

views/controls/native/native_view_host_wrapper.h

Index: views/controls/native/native_view_host_wrapper.h
===================================================================
--- views/controls/native/native_view_host_wrapper.h	(revision 17205)
+++ views/controls/native/native_view_host_wrapper.h	(working copy)
@@ -14,6 +14,8 @@
 // native view when attached, detached, moved and sized.
 class NativeViewHostWrapper {
  public:
+  virtual ~NativeViewHostWrapper() {}
+
   // Called when a gfx::NativeView has been attached to the associated
   // NativeViewHost, allowing the wrapper to perform platform-specific
   // initialization.