[Session restore] Add MRU logic to loading of background pages.

components/sessions/base_session_service_commands.h

Index: components/sessions/base_session_service_commands.h
diff --git a/components/sessions/base_session_service_commands.h b/components/sessions/base_session_service_commands.h
index d7bc7a184cd8bc0a2a75abbde6416e3b77262dcc..e116c28c9f24491d4dd9d35fc21aec8363ba20ee 100644
--- a/components/sessions/base_session_service_commands.h
+++ b/components/sessions/base_session_service_commands.h
@@ -43,6 +43,12 @@ SESSIONS_EXPORT scoped_ptr<SessionCommand> CreateSetWindowAppNameCommand(
     SessionID::id_type window_id,
     const std::string& app_name);
 
+// Creates a SessionCommand stores the last time the tab was activated.
+SESSIONS_EXPORT scoped_ptr<SessionCommand> CreateLastActiveTimeCommand(

[sky, 2015/05/12 21:25:30]

Is this used?

[Georges Khalil, 2015/05/15 16:55:30]

Not anymore, removed.

+    SessionID::id_type command_id,
+    SessionID::id_type window_id,
+    const std::string& app_name);
+
 // Converts a SessionCommand previously created by
 // CreateUpdateTabNavigationCommand into a
 // sessions::SerializedNavigationEntry. Returns true on success. If