Add a field trial to disable deferred committing of cookie changes

chrome/browser/chrome_content_browser_client.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 "chrome/browser/chrome_content_browser_client.h"
 
 #include <set>
 #include <utility>
 #include <vector>
 
@@ skipping 1209 matching lines @@
     content::RenderProcessHost* process_host) {
   // If there is currently a prerender in progress for the host provided,
   // it may not be shared. We require prerenders to be by themselves in a
   // separate process, so that we can monitor their resource usage, and so that
   // we can track the cookies that they change.
   Profile* profile = Profile::FromBrowserContext(
       process_host->GetBrowserContext());
   prerender::PrerenderManager* prerender_manager =
       prerender::PrerenderManagerFactory::GetForProfile(profile);
   if (prerender_manager &&
-      prerender_manager->IsProcessPrerendering(process_host)) {
+      !prerender_manager->MayReuseProcessHost(process_host)) {
     return false;
   }
 
   return true;
 }
 
 // This function is trying to limit the amount of processes used by extensions
 // with background pages. It uses a globally set percentage of processes to
 // run such extensions and if the limit is exceeded, it returns true, to
 // indicate to the content module to group extensions together.
@@ skipping 1508 matching lines @@
       switches::kDisableWebRtcEncryption,
     };
     to_command_line->CopySwitchesFrom(from_command_line,
                                       kWebRtcDevSwitchNames,
                                       arraysize(kWebRtcDevSwitchNames));
   }
 }
 #endif  // defined(ENABLE_WEBRTC)
 
 }  // namespace chrome