Stack allocating block scoped variables.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 7351d1333176876f56096b2d854e06d61c1069af..0696f052fd97a9a4e89645ca974c95ef64486fc1 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -3191,11 +3191,13 @@ class ScopeInfo : public FixedArray {
   // 3. The number of non-parameter variables allocated on the stack.
   // 4. The number of non-parameter and parameter variables allocated in the
   //    context.
+  // 5. The stack depth of the stack slots.
 #define FOR_EACH_NUMERIC_FIELD(V)          \
   V(Flags)                                 \
   V(ParameterCount)                        \
   V(StackLocalCount)                       \
-  V(ContextLocalCount)
+  V(ContextLocalCount)                     \
+  V(StackSlotsDepth)
 
 #define FIELD_ACCESSORS(name)                            \
   void Set##name(int value) {                            \