Enable the CrossSiteIframe test for --site-per-process to catch regressions.

content/browser/frame_host/navigator_impl.cc

 // Copyright 2013 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/frame_host/navigator_impl.h"
 
 #include "base/command_line.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/frame_tree_node.h"
 #include "content/browser/frame_host/navigation_controller_impl.h"
@@ skipping 381 matching lines @@
       DCHECK(PageTransitionIsMainFrame(params.transition));
     frame_tree->OnFirstNavigationAfterSwap(params.frame_id);
   }
 
   // When using --site-per-process, look up the FrameTreeNode ID that the
   // renderer-specific frame ID corresponds to.
   int64 frame_tree_node_id = frame_tree->root()->frame_tree_node_id();
   if (use_site_per_process) {
     frame_tree_node_id =
         render_frame_host->frame_tree_node()->frame_tree_node_id();
-    DCHECK_EQ(params.frame_id,
-              render_frame_host->frame_tree_node()->frame_id());
 
     // TODO(creis): In the short term, cross-process subframe navigations are
     // happening in the pending RenderViewHost's top-level frame.  (We need to
     // both mirror the frame tree and get the navigation to occur in the correct
     // subframe to fix this.)  Until then, we should check whether we have a
     // pending NavigationEntry with a frame ID and if so, treat the
     // cross-process "main frame" navigation as a subframe navigation.  This
     // limits us to a single cross-process subframe per RVH, and it affects
     // NavigateToEntry, NavigatorImpl::DidStartProvisionalLoad, and
     // OnDidFinishLoad.
@@ skipping 115 matching lines @@
   // still be used for a normal web site.
   if (url == GURL(kAboutBlankURL))
     return false;
 
   // The embedder will then have the opportunity to determine if the URL
   // should "use up" the SiteInstance.
   return GetContentClient()->browser()->ShouldAssignSiteForURL(url);
 }
 
 }  // namespace content