harmony-scoping: make assignment to 'const' a late error.

src/runtime/runtime.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/zone.h"
@@ skipping 482 matching lines @@
   /* Statements */                                           \
   F(NewClosure, 3, 1)                                        \
   F(NewClosureFromStubFailure, 1, 1)                         \
   F(NewObject, 1, 1)                                         \
   F(NewObjectWithAllocationSite, 2, 1)                       \
   F(FinalizeInstanceSize, 1, 1)                              \
   F(Throw, 1, 1)                                             \
   F(ReThrow, 1, 1)                                           \
   F(ThrowReferenceError, 1, 1)                               \
   F(ThrowNotDateError, 0, 1)                                 \
+  F(ThrowConstAssignError, 0, 1)                             \
   F(StackGuard, 0, 1)                                        \
   F(Interrupt, 0, 1)                                         \
   F(PromoteScheduledException, 0, 1)                         \
                                                              \
   /* Contexts */                                             \
   F(NewScriptContext, 2, 1)                                  \
   F(NewFunctionContext, 1, 1)                                \
   F(PushWithContext, 2, 1)                                   \
   F(PushCatchContext, 3, 1)                                  \
   F(PushBlockContext, 2, 1)                                  \
@@ skipping 376 matching lines @@
 class AllocateTargetSpace : public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 class DeclareGlobalsStrictMode : public BitField<StrictMode, 2, 1> {};
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_