Ensure LegacyRenderWidgetHostHWND is always created.

content/browser/web_contents/web_contents_view_aura.cc

Index: content/browser/web_contents/web_contents_view_aura.cc
diff --git a/content/browser/web_contents/web_contents_view_aura.cc b/content/browser/web_contents/web_contents_view_aura.cc
index 98efc51cbca27630cf64b965849ebfb11b124180..63856d1e2de32e4050125482d19cbdac4724eb35 100644
--- a/content/browser/web_contents/web_contents_view_aura.cc
+++ b/content/browser/web_contents/web_contents_view_aura.cc
@@ -502,7 +502,8 @@ WebContentsViewAura::WebContentsViewAura(WebContentsImpl* web_contents,
       current_rvh_for_drag_(NULL),
       current_overscroll_gesture_(OVERSCROLL_NONE),
       completed_overscroll_gesture_(OVERSCROLL_NONE),
-      navigation_overlay_(nullptr) {}
+      navigation_overlay_(nullptr),
+      init_rwhv_with_null_parent_for_testing_(false) {}
 
 void WebContentsViewAura::SetDelegateForTesting(
     WebContentsViewDelegate* delegate) {
@@ -600,6 +601,12 @@ WebContentsViewAura::GetSelectionControllerClient() const {
   return view ? view->selection_controller_client() : nullptr;
 }
 
+gfx::NativeView WebContentsViewAura::GetRenderWidgetHostViewParent() const {
+  if (init_rwhv_with_null_parent_for_testing_)
+    return nullptr;
+  return window_.get();
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // WebContentsViewAura, WebContentsView implementation:
 
@@ -736,7 +743,7 @@ RenderWidgetHostViewBase* WebContentsViewAura::CreateViewForWidget(
 
   RenderWidgetHostViewAura* view =
       new RenderWidgetHostViewAura(render_widget_host, is_guest_view_hack);
-  view->InitAsChild(GetNativeView());
+  view->InitAsChild(GetRenderWidgetHostViewParent());
 
   RenderWidgetHostImpl* host_impl =
       RenderWidgetHostImpl::From(render_widget_host);