Consolidate all TDI SiteInstances into one render process.

content/browser/site_instance_impl.h

 // 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.
 
 #ifndef CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_
 #define CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 126 matching lines @@
   // RenderProcessHostObserver implementation.
   void RenderProcessHostDestroyed(RenderProcessHost* host) override;
   void RenderProcessWillExit(RenderProcessHost* host) override;
   void RenderProcessExited(RenderProcessHost* host,
                            base::TerminationStatus status,
                            int exit_code) override;
 
   // Used to restrict a process' origin access rights.
   void LockToOrigin();
 
+  // This gets the render process to use for default subframe site instances.
+  RenderProcessHost* GetDefaultSubframeProcessHost(
+      BrowserContext* browser_context,
+      bool is_for_guests_only);
+
   void set_is_default_subframe_site_instance() {
     is_default_subframe_site_instance_ = true;
   }
 
   // An object used to construct RenderProcessHosts.
   static const RenderProcessHostFactory* g_render_process_host_factory_;
 
   // The next available SiteInstance ID.
   static int32_t next_site_instance_id_;
 
@@ skipping 24 matching lines @@
   bool is_default_subframe_site_instance_;
 
   base::ObserverList<Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(SiteInstanceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SITE_INSTANCE_IMPL_H_