Adds yet more debugging in hopes of tracking 91396. The latest data

views/widget/widget.h

Index: views/widget/widget.h
diff --git a/views/widget/widget.h b/views/widget/widget.h
index a85b6190cbd18e07de393c7e86065b46eccbb1b6..70e527c57b694a787bc2d9d9144682fac2c3b9ef 100644
--- a/views/widget/widget.h
+++ b/views/widget/widget.h
@@ -101,6 +101,20 @@ class VIEWS_EXPORT Widget : public internal::NativeWidgetDelegate,
 
   typedef std::set<Widget*> Widgets;
 
+  enum DestroyState {
+    // The default, everything is good and alive.
+    DESTROY_STATE_NONE = 1,
+
+    // Set once OnNativeWidgetDestroying has been invoked.
+    DESTROY_STATE_IN_DESTROYING,
+
+    // Set once OnNativeWidgetDestroyed has been invoked.
+    DESTROY_STATE_DESTROYED,
+
+    // Set once the destructor is invoked.
+    DESTROY_STATE_DELETED,
+  };
+
   enum FrameType {
     FRAME_TYPE_DEFAULT,         // Use whatever the default would be.
     FRAME_TYPE_FORCE_CUSTOM,    // Force the custom frame.
@@ -564,6 +578,8 @@ class VIEWS_EXPORT Widget : public internal::NativeWidgetDelegate,
   // TYPE_CONTROL and TYPE_TOOLTIP is not considered top level.
   bool is_top_level() const { return is_top_level_; }
 
+  DestroyState destroy_state() const { return destroy_state_; }
+
   // Overridden from NativeWidgetDelegate:
   virtual bool IsModal() const OVERRIDE;
   virtual bool IsDialogBox() const OVERRIDE;
@@ -727,6 +743,10 @@ class VIEWS_EXPORT Widget : public internal::NativeWidgetDelegate,
   // Factory used to create Compositors. Settable by tests.
   static ui::Compositor*(*compositor_factory_)();
 
+  // Tracks destroy state.
+  // TODO(sky): remove this, used in tracking 91396.
+  DestroyState destroy_state_;
+
   DISALLOW_COPY_AND_ASSIGN(Widget);
 };