Add a factory function to create WebContentsView implementations.

content/browser/web_contents/web_contents_view_aura.cc

 // Copyright (c) 2012 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 "content/browser/web_contents/web_contents_view_aura.h"
 
 #include "base/utf_string_conversions.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/web_contents/interstitial_page_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
@@ skipping 11 matching lines @@
 #include "ui/aura/window.h"
 #include "ui/base/clipboard/custom_data_helper.h"
 #include "ui/base/dragdrop/drag_drop_types.h"
 #include "ui/base/dragdrop/os_exchange_data.h"
 #include "ui/base/dragdrop/os_exchange_data_provider_aura.h"
 #include "ui/base/hit_test.h"
 #include "ui/compositor/layer.h"
 #include "ui/gfx/screen.h"
 #include "webkit/glue/webdropdata.h"
 
+namespace content {
+WebContentsView* CreateWebContentsView(WebContentsImpl* web_contents,
+                                       WebContentsViewDelegate* delegate) {
+  return new WebContentsViewAura(web_contents, delegate);
+}
+}
+
 namespace {
 
 // Listens to all mouse drag events during a drag and drop and sends them to
 // the renderer.
 class WebDragSourceAura : public MessageLoopForUI::Observer {
  public:
   explicit WebDragSourceAura(WebContentsImpl* contents)
       : contents_(contents) {
     MessageLoopForUI::current()->AddObserver(this);
   }
@@ skipping 603 matching lines @@
     OnDragEntered(event);
 
   web_contents_->GetRenderViewHost()->DragTargetDrop(
       event.location(),
       GetNativeView()->GetRootWindow()->last_mouse_location(),
       ConvertAuraEventFlagsToWebInputEventModifiers(event.flags()));
   if (drag_dest_delegate_)
     drag_dest_delegate_->OnDrop();
   return current_drag_op_;
 }