Remove kSwappedOutURL as it is now unused.

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 2133 matching lines @@
 // static
 void RenderProcessHostImpl::FilterURL(RenderProcessHost* rph,
                                       bool empty_allowed,
                                       GURL* url) {
   ChildProcessSecurityPolicyImpl* policy =
       ChildProcessSecurityPolicyImpl::GetInstance();
 
   if (empty_allowed && url->is_empty())
     return;
 
-  // The browser process should never hear the swappedout:// URL from any
-  // of the renderer's messages.  Check for this in debug builds, but don't
-  // let it crash a release browser.
-  DCHECK(GURL(kSwappedOutURL) != *url);
-
   if (!url->is_valid()) {
     // Have to use about:blank for the denied case, instead of an empty GURL.
     // This is because the browser treats navigation to an empty GURL as a
     // navigation to the home page. This is often a privileged page
     // (chrome://newtab/) which is exactly what we don't want.
     *url = GURL(url::kAboutBlankURL);
     return;
   }
 
   if (url->SchemeIs(url::kAboutScheme)) {
@@ skipping 646 matching lines @@
 
     // Skip widgets in other processes.
     if (rvh->GetProcess()->GetID() != GetID())
       continue;
 
     rvh->OnWebkitPreferencesChanged();
   }
 }
 
 }  // namespace content