Preliminary code for block scopes and block contexts.

src/scopeinfo.cc

Index: src/scopeinfo.cc
diff --git a/src/scopeinfo.cc b/src/scopeinfo.cc
index 3e18368f74bde67569d01223a66717b64ad10bd2..0eacc83c79a3b5d5c11d8bc50e2836317b8a78b2 100644
--- a/src/scopeinfo.cc
+++ b/src/scopeinfo.cc
@@ -313,7 +313,7 @@ Handle<SerializedScopeInfo> ScopeInfo<Allocator>::Serialize() {
                stack_slots_.length();
 
   Handle<SerializedScopeInfo> data(
-      SerializedScopeInfo::cast(*FACTORY->NewFixedArray(length, TENURED)));
+      SerializedScopeInfo::cast(*FACTORY->NewSerializedScopeInfo(length)));
   AssertNoAllocation nogc;
 
   Object** p0 = data->data_start();