Don't mark a history navigation as in page in a new renderer process.

content/browser/frame_host/navigation_controller_impl.cc

Index: content/browser/frame_host/navigation_controller_impl.cc
diff --git a/content/browser/frame_host/navigation_controller_impl.cc b/content/browser/frame_host/navigation_controller_impl.cc
index 2b21fd9296ce3828ee0b2417a9174fc788e022e6..4a288c1744edb2bd1af9d430370765df98e7a94c 100644
--- a/content/browser/frame_host/navigation_controller_impl.cc
+++ b/content/browser/frame_host/navigation_controller_impl.cc
@@ -1910,9 +1910,16 @@ void NavigationControllerImpl::FindFramesToNavigate(
       new_item->item_sequence_number() != old_item->item_sequence_number() ||
       (new_item->site_instance() != nullptr &&
        new_item->site_instance() != old_item->site_instance())) {
+    // Same document loads happen if the previous item has the same document
+    // sequence number.  Note that we should treat them as different document if
+    // the destination RenderFrameHost (which is necessarily the current
+    // RenderFrameHost for same document navigations) doesn't have a last
+    // committed page.  This case can happen for Ctrl+Back or after a renderer
+    // crash.
     if (old_item &&
         new_item->document_sequence_number() ==
-            old_item->document_sequence_number()) {
+            old_item->document_sequence_number() &&
+        !frame->current_frame_host()->last_committed_url().is_empty()) {
       same_document_loads->push_back(std::make_pair(frame, new_item));
 
       // TODO(avi, creis): This is a bug; we should not return here. Rather, we