[compiler] Decouple ToObject from CreateWithContext.

src/compiler/ast-graph-builder.cc

Index: src/compiler/ast-graph-builder.cc
diff --git a/src/compiler/ast-graph-builder.cc b/src/compiler/ast-graph-builder.cc
index 66c778b88a6a12c06d67d51a83909dc3184b373d..f623f666ca8abd6ef6bf5ce91f644ac5d15bd40b 100644
--- a/src/compiler/ast-graph-builder.cc
+++ b/src/compiler/ast-graph-builder.cc
@@ -1199,8 +1199,9 @@ void AstGraphBuilder::VisitReturnStatement(ReturnStatement* stmt) {
 void AstGraphBuilder::VisitWithStatement(WithStatement* stmt) {
   VisitForValue(stmt->expression());
   Node* value = environment()->Pop();
+  Node* object = BuildToObject(value, stmt->ToObjectId());
   const Operator* op = javascript()->CreateWithContext();
-  Node* context = NewNode(op, value, GetFunctionClosureForContext());
+  Node* context = NewNode(op, object, GetFunctionClosureForContext());
   PrepareFrameState(context, stmt->EntryId());
   VisitInScope(stmt->statement(), stmt->scope(), context);
 }