Support profiling based on linux kernel performance events.

src/cpu-profiler.h

Index: src/cpu-profiler.h
diff --git a/src/cpu-profiler.h b/src/cpu-profiler.h
index 86f9f6711f9f21713130f24fcdea3e61149112ef..f52bd67d9cb9ee3a0be03ba6690776dc2af0051d 100644
--- a/src/cpu-profiler.h
+++ b/src/cpu-profiler.h
@@ -251,6 +251,7 @@ class CpuProfiler {
                               String* source, int line);
   static void CodeCreateEvent(Logger::LogEventsAndTags tag,
                               Code* code, int args_count);
+  static void CodeMovingGCEvent() {}
   static void CodeMoveEvent(Address from, Address to);
   static void CodeDeleteEvent(Address from);
   static void FunctionCreateEvent(JSFunction* function);