Add just enough state changes from EXTERNAL (outside V8) to OTHER...

src/log.cc

Index: src/log.cc
===================================================================
--- src/log.cc	(revision 1641)
+++ src/log.cc	(working copy)
@@ -407,7 +407,7 @@
 Profiler* Logger::profiler_ = NULL;
 Mutex* Logger::mutex_ = NULL;
 VMState* Logger::current_state_ = NULL;
-VMState Logger::bottom_state_(OTHER);
+VMState Logger::bottom_state_(EXTERNAL);
 SlidingStateWindow* Logger::sliding_state_window_ = NULL;
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
@@ -1110,6 +1110,13 @@
 }
 
 VMState::VMState(StateTag state) {
+#if !defined(ENABLE_HEAP_PROTECTION)
+  // When not protecting the heap, there is no difference between
+  // EXTERNAL and OTHER.  As an optimizatin in that case, we will not
+  // perform EXTERNAL->OTHER transitions through the API.  We thus
+  // compress the two states into one.
+  if (state == EXTERNAL) state = OTHER;
+#endif
   state_ = state;
   previous_ = Logger::current_state_;
   Logger::current_state_ = this;