Make --site-per-process override --process-per-tab in RFHM::ShouldTransitionCrossSite

content/browser/frame_host/render_frame_host_manager.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/render_frame_host_manager.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 826 matching lines @@
                                                         FrameTreeNode* node) {
   RenderFrameProxyHostMap::iterator iter =
       node->render_manager()->proxy_hosts_.find(site_instance_id);
   if (iter != node->render_manager()->proxy_hosts_.end())
     iter->second->set_render_frame_proxy_created(false);
 
   return true;
 }
 
 bool RenderFrameHostManager::ShouldTransitionCrossSite() {
+  // True for --site-per-process, which overrides both kSingleProcess and
+  // kProcessPerTab.
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kSitePerProcess))
+    return true;
+
   // False in the single-process mode, as it makes RVHs to accumulate
   // in swapped_out_hosts_.
   // True if we are using process-per-site-instance (default) or
   // process-per-site (kProcessPerSite).
   return !base::CommandLine::ForCurrentProcess()->HasSwitch(
              switches::kSingleProcess) &&
          !base::CommandLine::ForCurrentProcess()->HasSwitch(
              switches::kProcessPerTab);
 }
 
@@ skipping 1076 matching lines @@
 void RenderFrameHostManager::DeleteRenderFrameProxyHost(
     SiteInstance* instance) {
   RenderFrameProxyHostMap::iterator iter = proxy_hosts_.find(instance->GetId());
   if (iter != proxy_hosts_.end()) {
     delete iter->second;
     proxy_hosts_.erase(iter);
   }
 }
 
 }  // namespace content