Create FrameNavigationEntries for manual subframe navigations.

content/browser/frame_host/navigation_controller_impl.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/navigation_controller_impl.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ skipping 1375 matching lines @@
     DiscardNonCommittedEntriesInternal();
     return;
   }
 
   // Manual subframe navigations just get the current entry cloned so the user
   // can go back or forward to it. The actual subframe information will be
   // stored in the page state for each of those entries. This happens out of
   // band with the actual navigations.
   DCHECK(GetLastCommittedEntry()) << "ClassifyNavigation should guarantee "
                                   << "that a last committed entry exists.";
-  NavigationEntryImpl* new_entry = GetLastCommittedEntry()->Clone();
+
+  NavigationEntryImpl* new_entry = nullptr;
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kSitePerProcess)) {
+    // Make sure new_entry takes ownership of frame_entry in a scoped_refptr.
+    FrameNavigationEntry* frame_entry = new FrameNavigationEntry(
+        rfh->frame_tree_node()->frame_tree_node_id(), rfh->GetSiteInstance(),
+        params.url, params.referrer);
+    new_entry = GetLastCommittedEntry()->CloneAndReplace(rfh->frame_tree_node(),
+                                                         frame_entry);
+    CHECK(frame_entry->HasOneRef());
+  } else {
+    new_entry = GetLastCommittedEntry()->Clone();
+  }
+
   new_entry->SetPageID(params.page_id);
   InsertOrReplaceEntry(new_entry, false);
 }
 
 bool NavigationControllerImpl::RendererDidNavigateAutoSubframe(
     RenderFrameHostImpl* rfh,
     const FrameHostMsg_DidCommitProvisionalLoad_Params& params) {
   DCHECK(ui::PageTransitionCoreTypeIs(params.transition,
                                       ui::PAGE_TRANSITION_AUTO_SUBFRAME));
 
@@ skipping 629 matching lines @@
     }
   }
 }
 
 void NavigationControllerImpl::SetGetTimestampCallbackForTest(
     const base::Callback<base::Time()>& get_timestamp_callback) {
   get_timestamp_callback_ = get_timestamp_callback;
 }
 
 }  // namespace content