Makes views be initially hidden

sky/viewer/document_view.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "sky/viewer/document_view.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 151 matching lines @@
 
   if (!web_view_->settings()->compositorIsEnabled())
     web_layer_tree_view_impl_->setNeedsAnimate();
 }
 
 mojo::View* DocumentView::createChildFrame(const blink::WebURL& url) {
   if (!root_)
     return nullptr;
 
   mojo::View* child = mojo::View::Create(root_->view_manager());
+  child->SetVisible(true);
   root_->AddChild(child);
   child->Embed(mojo::String::From(url.string().utf8()));
 
   return child;
 }
 
 void DocumentView::frameDetached(blink::WebFrame* frame) {
   // |frame| is invalid after here.
   frame->close();
 }
@@ skipping 65 matching lines @@
 
 void DocumentView::OnViewInputEvent(
     mojo::View* view, const mojo::EventPtr& event) {
   scoped_ptr<blink::WebInputEvent> web_event =
       event.To<scoped_ptr<blink::WebInputEvent> >();
   if (web_event)
     web_view_->handleInputEvent(*web_event);
 }
 
 }  // namespace sky