Introduce all the plumbing for Session Storage. This mostly consists of crea...

chrome/browser/tab_contents/navigation_controller.cc

Index: chrome/browser/tab_contents/navigation_controller.cc
===================================================================
--- chrome/browser/tab_contents/navigation_controller.cc	(revision 36257)
+++ chrome/browser/tab_contents/navigation_controller.cc	(working copy)
@@ -12,6 +12,8 @@
 #include "chrome/browser/browser_about_handler.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/browser_url_handler.h"
+#include "chrome/browser/in_process_webkit/dom_storage_context.h"
+#include "chrome/browser/in_process_webkit/webkit_context.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/renderer_host/site_instance.h"
 #include "chrome/browser/sessions/session_types.h"
@@ -133,7 +135,9 @@
       max_restored_page_id_(-1),
       ALLOW_THIS_IN_INITIALIZER_LIST(ssl_manager_(this)),
       needs_reload_(false),
-      user_gesture_observed_(false) {
+      user_gesture_observed_(false),
+      session_storage_namespace_id_(profile->GetWebKitContext()->
+          dom_storage_context()->AllocateSessionStorageNamespaceId()) {
   DCHECK(profile_);
 }
 
@@ -144,6 +148,10 @@
       NotificationType::TAB_CLOSED,
       Source<NavigationController>(this),
       NotificationService::NoDetails());
+
+  // When we go away, the session storage namespace will no longer be reachable.
+  profile_->GetWebKitContext()->DeleteSessionStorageNamespace(
+      session_storage_namespace_id_);
 }
 
 void NavigationController::RestoreFromState(
@@ -856,6 +864,10 @@
         new NavigationEntry(*source.entries_[i])));
   }
 
+  session_storage_namespace_id_ =
+      profile_->GetWebKitContext()->dom_storage_context()->CloneSessionStorage(
+          source.session_storage_namespace_id_);
+
   FinishRestore(source.last_committed_entry_index_, false);
 }