Add a factory function to create WebContentsView implementations.

content/browser/web_contents/web_contents_view_win.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_win.h"
 
 #include "base/bind.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_win.h"
 #include "content/browser/web_contents/interstitial_page_impl.h"
 #include "content/browser/web_contents/web_contents_drag_win.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/browser/web_contents/web_drag_dest_win.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_view_delegate.h"
 #include "ui/gfx/screen.h"
 
 using content::RenderViewHost;
 using content::RenderWidgetHostView;
 using content::WebContents;
 using content::WebContentsViewDelegate;
 
+namespace content {
+WebContentsView* CreateWebContentsView(WebContentsImpl* web_contents,
+                                       WebContentsViewDelegate* delegate) {
+  return new WebContentsViewWin(web_contents, delegate);
+}
+}
+
 namespace {
 
 // We need to have a parent window for the compositing code to work correctly.
 //
 // A tab will not have a parent HWND whenever it is not active in its
 // host window - for example at creation time and when it's in the
 // background, so we provide a default widget to host them.
 //
 // It may be tempting to use GetDesktopWindow() instead, but this is
 // problematic as the shell sends messages to children of the desktop
@@ skipping 446 matching lines @@
   si.nMin = 1;
   si.nMax = 100;
   si.nPage = 10;
   si.nPos = 50;
 
   ::SetScrollInfo(hwnd(), SB_HORZ, &si, FALSE);
   ::SetScrollInfo(hwnd(), SB_VERT, &si, FALSE);
 
   return 1;
 }