diff --git web_contents_impl.cc web_contents_impl.cc
index ccadfb2..b70b8e4 100644
--- web_contents_impl.cc
+++ web_contents_impl.cc
@@ -1388,32 +1388,40 @@ void WebContentsImpl::Init(const WebContents::CreateParams& params) {
                            main_frame_widget_routing_id);
   frame_tree_.root()->SetFrameName(params.main_frame_name);
 
-  WebContentsViewDelegate* delegate =
-      GetContentClient()->browser()->GetWebContentsViewDelegate(this);
+  if (params.view && params.delegate_view) {
+    view_.reset(params.view);
+    render_view_host_delegate_view_ = params.delegate_view;
+  }
+
+  if (!view_) {
+    WebContentsViewDelegate* delegate =
+        GetContentClient()->browser()->GetWebContentsViewDelegate(this);
 
 #if defined(MOJO_SHELL_CLIENT)
-  if (MojoShellConnection::Get() &&
-      base::CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kUseMusInRenderer)) {
-    mus::Window* mus_window = aura::GetMusWindow(params.context);
-    if (mus_window) {
-      view_.reset(new WebContentsViewMus(mus_window, this, delegate,
-                                         &render_view_host_delegate_view_));
+    if (MojoShellConnection::Get() &&
+        base::CommandLine::ForCurrentProcess()->HasSwitch(
+            switches::kUseMusInRenderer)) {
+      mus::Window* mus_window = aura::GetMusWindow(params.context);
+      if (mus_window) {
+        view_.reset(new WebContentsViewMus(mus_window, this, delegate,
+                                           &render_view_host_delegate_view_));
+      }
     }
-  }
 #endif
 
-  if (!view_) {
-    view_.reset(CreateWebContentsView(this, delegate,
-                                      &render_view_host_delegate_view_));
-  }
+    if (!view_) {
+      view_.reset(CreateWebContentsView(this, delegate,
+                                        &render_view_host_delegate_view_));
+    }
 
-  if (browser_plugin_guest_ &&
-      !BrowserPluginGuestMode::UseCrossProcessFramesForGuests()) {
-    view_.reset(new WebContentsViewGuest(this, browser_plugin_guest_.get(),
-                                         std::move(view_),
-                                         &render_view_host_delegate_view_));
+    if (browser_plugin_guest_ &&
+        !BrowserPluginGuestMode::UseCrossProcessFramesForGuests()) {
+      view_.reset(new WebContentsViewGuest(this, browser_plugin_guest_.get(),
+                                           std::move(view_),
+                                           &render_view_host_delegate_view_));
+    }
   }
+
   CHECK(render_view_host_delegate_view_);
   CHECK(view_.get());
 
@@ -1835,11 +1843,14 @@ void WebContentsImpl::CreateNewWindow(
       static_cast<SessionStorageNamespaceImpl*>(session_storage_namespace);
   CHECK(session_storage_namespace_impl->IsFromContext(dom_storage_context));
 
+  content::WebContentsView* view = NULL;
+  content::RenderViewHostDelegateView* delegate_view = NULL;
+
   if (delegate_ &&
       !delegate_->ShouldCreateWebContents(
           this, route_id, main_frame_route_id, main_frame_widget_route_id,
           params.window_container_type, params.frame_name, params.target_url,
-          partition_id, session_storage_namespace)) {
+          partition_id, session_storage_namespace, &view, &delegate_view)) {
     if (route_id != MSG_ROUTING_NONE &&
         !RenderViewHost::FromID(render_process_id, route_id)) {
       // If the embedder didn't create a WebContents for this route, we need to
@@ -1860,6 +1871,8 @@ void WebContentsImpl::CreateNewWindow(
   create_params.opener_render_process_id = render_process_id;
   create_params.opener_render_frame_id = params.opener_render_frame_id;
   create_params.opener_suppressed = params.opener_suppressed;
+  create_params.view = view;
+  create_params.delegate_view = delegate_view;
   if (params.disposition == NEW_BACKGROUND_TAB)
     create_params.initially_hidden = true;
   create_params.renderer_initiated_creation =