Check that we have a focus manager in aura before trying to set focus.

chrome/browser/ui/views/tab_contents/native_tab_contents_view_aura.cc

 // Copyright (c) 2011 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 "chrome/browser/ui/views/tab_contents/native_tab_contents_view_aura.h"
 
 #include "base/event_types.h"
 #include "base/message_loop.h"
 #include "chrome/browser/ui/views/tab_contents/native_tab_contents_view_delegate.h"
 #include "content/browser/renderer_host/render_view_host.h"
@@ skipping 125 matching lines @@
 }
 
 TabContents* NativeTabContentsViewAura::GetTabContents() const {
   return delegate_->GetTabContents();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeTabContentsViewAura, NativeTabContentsView implementation:
 
 void NativeTabContentsViewAura::InitNativeTabContentsView() {
-  views::Widget::InitParams params(views::Widget::InitParams::TYPE_CONTROL);
+  views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
   params.native_widget = this;
   // We don't draw anything so we don't need a texture.
   params.create_texture_for_layer = false;
   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
   params.parent = NULL;
   GetWidget()->Init(params);
 
   // Hide the widget to prevent it from showing up on the desktop. This is
   // needed for TabContentses that aren't immediately added to the tabstrip,
   // e.g. the Instant preview contents.
@@ skipping 161 matching lines @@
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // NativeTabContentsView, public:
 
 // static
 NativeTabContentsView* NativeTabContentsView::CreateNativeTabContentsView(
     internal::NativeTabContentsViewDelegate* delegate) {
   return new NativeTabContentsViewAura(delegate);
 }