Attempt 2 at: Fixes crash that occured because NativeViewHostAura::Detach was not

ui/views/controls/native/native_view_host_win.h

Index: ui/views/controls/native/native_view_host_win.h
diff --git a/ui/views/controls/native/native_view_host_win.h b/ui/views/controls/native/native_view_host_win.h
index ab83ae69004d64ba3fa6412740683e4c0ae871ac..2b67c50349acd6cf1e92c1b33203bcd8e3126173 100644
--- a/ui/views/controls/native/native_view_host_win.h
+++ b/ui/views/controls/native/native_view_host_win.h
@@ -32,11 +32,6 @@ class NativeViewHostWin : public NativeViewHostWrapper {
   virtual gfx::NativeViewAccessible GetNativeViewAccessible();
 
  private:
-  // Invokes ViewRemoved() on the FocusManager for all the child Widgets of our
-  // NativeView. This is used when detaching to ensure the FocusManager doesn't
-  // have a reference to a View that is no longer reachable.
-  void ClearFocus();
-
   // Our associated NativeViewHost.
   NativeViewHost* host_;