DRAFT CL: Add FrameNavigationEntry and track subframe session histories.

content/browser/frame_host/frame_navigation_entry.cc

Index: content/browser/frame_host/frame_navigation_entry.cc
diff --git a/content/browser/frame_host/frame_navigation_entry.cc b/content/browser/frame_host/frame_navigation_entry.cc
index a33f9732b3c6c77d4437e435cc2eae9223b92dd8..ac62c2ba9835e147e868bd49910e68ae075294b7 100644
--- a/content/browser/frame_host/frame_navigation_entry.cc
+++ b/content/browser/frame_host/frame_navigation_entry.cc
@@ -6,13 +6,20 @@
 
 namespace content {
 
-FrameNavigationEntry::FrameNavigationEntry() {
+FrameNavigationEntry::FrameNavigationEntry()
+    : frame_tree_node_id_(-1),
+      item_sequence_number_(-1) {
 }
 
-FrameNavigationEntry::FrameNavigationEntry(SiteInstanceImpl* site_instance,
+FrameNavigationEntry::FrameNavigationEntry(SiteInstanceImpl* instance,
                                            const GURL& url,
                                            const Referrer& referrer)
-    : site_instance_(site_instance), url_(url), referrer_(referrer) {
+    : site_instance_(instance),
+      url_(url),
+      referrer_(referrer),
+      frame_tree_node_id_(-1),
+      item_sequence_number_(-1),
+      document_sequence_number_(-1) {
 }
 
 FrameNavigationEntry::~FrameNavigationEntry() {
@@ -24,6 +31,9 @@ FrameNavigationEntry* FrameNavigationEntry::Clone() const {
   copy->site_instance_ = site_instance_;
   copy->url_ = url_;
   copy->referrer_ = referrer_;
+  copy->page_state_ = page_state_;
+  copy->item_sequence_number_ = item_sequence_number_;
+  copy->document_sequence_number_ = document_sequence_number_;
 
   return copy;
 }