Changes to create an application snapshot which can be layered on top

vm/timer.h

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_TIMER_H_
 #define VM_TIMER_H_
 
 #include "vm/allocation.h"
 #include "vm/flags.h"
 #include "vm/os.h"
@@ skipping 60 matching lines @@
   int64_t total_;
   bool enabled_;
   const char* message_;
 
   DISALLOW_COPY_AND_ASSIGN(Timer);
 };
 
 // List of per isolate timers.
 #define TIMER_LIST(V)                                                          \
   V(time_script_loading, "Script Loading : ")                                  \
+  V(time_creating_snapshot, "Snapshot Creation : ")                            \
   V(time_compilation, "Function compilation : ")                               \
   V(time_bootstrap, "Bootstrap of core classes : ")                            \
   V(time_total_runtime, "Total runtime for isolate : ")                        \
 
 // Declare command line flags for the timers.
 #define DECLARE_TIMER_FLAG(name, msg)                                          \
   DECLARE_FLAG(bool, name);
 TIMER_LIST(DECLARE_TIMER_FLAG)
 #undef DECLARE_TIMER_FLAG
 DECLARE_FLAG(bool, time_all);  // In order to turn on all the timer flags.
@@ skipping 59 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(TimerScope);
 };
 
 #define TIMERSCOPE(name)                                                       \
   TimerScope vm_internal_timer_((FLAG_##name || FLAG_time_all),                \
                                 &(Isolate::Current()->timer_list().name()))
 
 }  // namespace dart
 
 #endif  // VM_TIMER_H_