Add MDP for TabRestorer.

components/sessions/core/serialized_navigation_entry.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 "components/sessions/core/serialized_navigation_entry.h"
 
 #include <stddef.h>
 
 #include "base/pickle.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/trace_event/estimate_memory_usage.h"
 #include "components/sessions/core/serialized_navigation_driver.h"
 #include "components/sync/base/time.h"
 #include "components/sync/protocol/session_specifics.pb.h"
 
+// TODO(dskiba): move somemhere
+size_t EstimateMemoryUsage(const GURL& url) {
+  using base::trace_event::EstimateMemoryUsage;
+  return EstimateMemoryUsage(url.possibly_invalid_spec()) +
+         (url.inner_url() ? EstimateMemoryUsage(*url.inner_url()) : 0);
+}
+
 namespace sessions {
 
 // TODO(treib): Remove, not needed anymore. crbug.com/627747
 const char kSearchTermsKey[] = "search_terms";
 
 SerializedNavigationEntry::SerializedNavigationEntry()
     : index_(-1),
       unique_id_(0),
       transition_type_(ui::PAGE_TRANSITION_TYPED),
       has_post_data_(false),
@@ skipping 468 matching lines @@
       sync_data.set_last_navigation_redirect_url(
           redirect_chain_[last_entry].spec());
     }
   }
 
   sync_data.set_is_restored(is_restored_);
 
   return sync_data;
 }
 
+size_t SerializedNavigationEntry::EstimateMemoryUsage() const {
+  using base::trace_event::EstimateMemoryUsage;
+  return
+      EstimateMemoryUsage(referrer_url_) +
+      EstimateMemoryUsage(virtual_url_) +
+      EstimateMemoryUsage(title_) +
+      EstimateMemoryUsage(encoded_page_state_) +
+      EstimateMemoryUsage(original_request_url_) +
+      EstimateMemoryUsage(search_terms_) +
+      EstimateMemoryUsage(favicon_url_) +
+      EstimateMemoryUsage(redirect_chain_) +
+      EstimateMemoryUsage(content_pack_categories_) +
+      EstimateMemoryUsage(extended_info_map_);
+}
+
 }  // namespace sessions