Introduce IsUndefined(Isolate*) and IsTheHole(Isolate*)

src/debug/debug-scopes.cc

 // Copyright 2015 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.
 
 #include "src/debug/debug-scopes.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler.h"
 #include "src/debug/debug.h"
 #include "src/frames-inl.h"
@@ skipping 738 matching lines @@
   Isolate* isolate = scope_info->GetIsolate();
   int local_count = scope_info->ContextLocalCount();
   if (local_count == 0) return;
   // Fill all context locals to the context extension.
   for (int i = 0; i < local_count; ++i) {
     Handle<String> name(scope_info->ContextLocalName(i));
     if (ScopeInfo::VariableIsSynthetic(*name)) continue;
     int context_index = Context::MIN_CONTEXT_SLOTS + i;
     Handle<Object> value = Handle<Object>(context->get(context_index), isolate);
     // Reflect variables under TDZ as undefined in scope object.
-    if (value->IsTheHole()) continue;
+    if (value->IsTheHole(isolate)) continue;
     // This should always succeed.
     // TODO(verwaest): Use AddDataProperty instead.
     JSObject::SetOwnPropertyIgnoreAttributes(scope_object, name, value, NONE)
         .Check();
   }
 }
 
 void ScopeIterator::CopyContextExtensionToScopeObject(
     Handle<Context> context, Handle<JSObject> scope_object,
     KeyCollectionMode mode) {
@@ skipping 32 matching lines @@
     DCHECK((beg_pos >= 0 && end_pos >= 0) || inner_scope->is_hidden());
     if (beg_pos <= position && position < end_pos) {
       GetNestedScopeChain(isolate, inner_scope, position);
       return;
     }
   }
 }
 
 }  // namespace internal
 }  // namespace v8