Support cross-process navigations in a single subframe RenderFrameHost.

content/browser/renderer_host/render_view_host_impl.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 "content/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 684 matching lines @@
 }
 
 void RenderViewHostImpl::OnCrossSiteResponse(
     const GlobalRequestID& global_request_id,
     bool is_transfer,
     const std::vector<GURL>& transfer_url_chain,
     const Referrer& referrer,
     PageTransition page_transition,
     int64 frame_id,
     bool should_replace_current_entry) {
-  RenderViewHostDelegate::RendererManagement* manager =
-      delegate_->GetRendererManagementDelegate();
-  if (manager) {
-    manager->OnCrossSiteResponse(this, global_request_id, is_transfer,
-                                 transfer_url_chain, referrer, page_transition,
-                                 frame_id, should_replace_current_entry);
+  FrameTreeNode* node = NULL;
+  if (frame_id != -1 &&
+      CommandLine::ForCurrentProcess()->HasSwitch(switches::kSitePerProcess)) {
+    node = delegate_->GetFrameTree()->FindByFrameID(frame_id);
   }
+
+  // TODO(creis): We should always be able to get the RFHM for a frame_id,
+  // but today the frame_id is -1 for the main frame.
+  RenderViewHostDelegate::RendererManagement* manager = node ?
+      node->render_manager() : delegate_->GetRendererManagementDelegate();
+  manager->OnCrossSiteResponse(this, global_request_id, is_transfer,
+                               transfer_url_chain, referrer, page_transition,
+                               frame_id, should_replace_current_entry);
 }
 
 void RenderViewHostImpl::SuppressDialogsUntilSwapOut() {
   Send(new ViewMsg_SuppressDialogsUntilSwapOut(GetRoutingID()));
 }
 
 void RenderViewHostImpl::SwapOut() {
   // This will be set back to false in OnSwapOutACK, just before we replace
   // this RVH with the pending RVH.
   is_waiting_for_unload_ack_ = true;
@@ skipping 1599 matching lines @@
 void RenderViewHostImpl::AttachToFrameTree() {
   FrameTree* frame_tree = delegate_->GetFrameTree();
 
   frame_tree->ResetForMainFrameSwap();
   if (main_frame_id() != FrameTreeNode::kInvalidFrameId) {
     frame_tree->OnFirstNavigationAfterSwap(main_frame_id());
   }
 }
 
 }  // namespace content