Revert 177182 - ViewTest.ChangeNativeViewHierarchyFindRoots failure

ui/views/widget/native_widget_aura.cc

Index: ui/views/widget/native_widget_aura.cc
===================================================================
--- ui/views/widget/native_widget_aura.cc	(revision 177189)
+++ ui/views/widget/native_widget_aura.cc	(working copy)
@@ -136,8 +136,15 @@
   if (parent) {
     parent->AddChild(window_);
   } else {
-    window_->SetDefaultParentByRootWindow(context->GetRootWindow(),
-                                          window_bounds);
+    // TODO(erg): Once I've threaded context through chrome, uncomment this
+    // check, which currently fails on the NULL == NULL case.
+    //
+    // DCHECK_NE(params.GetParent(), params.context);
+
+    // TODO(erg): Remove this NULL check once we've made everything in views
+    // actually pass us a context.
+    aura::RootWindow* root_window = context ? context->GetRootWindow() : NULL;
+    window_->SetDefaultParentByRootWindow(root_window, window_bounds);
   }
 
   // Wait to set the bounds until we have a parent. That way we can know our