ES6: Add support for method shorthand in object literals

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 3c814f2127a7c3b61e1cdcced83c6a060f7ddf63..e22239727b7f97f93ab95cba24214a6f5e02e144 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -7200,6 +7200,17 @@ class SharedFunctionInfo: public HeapObject {
   // Indicates that this function is an arrow function.
   DECL_BOOLEAN_ACCESSORS(is_arrow)
 
+  // Indicates that this function is a concise method.
+  DECL_BOOLEAN_ACCESSORS(is_concise_method)
+
+  FunctionKind kind() const {
+    // TODO(arv): Update to handle concise generator methods.
+    if (is_arrow()) return FunctionKind::kArrowFunction;
+    if (is_generator()) return FunctionKind::kGeneratorFunction;
+    if (is_concise_method()) return FunctionKind::kConciseMethod;
+    return FunctionKind::kNormalFunction;
+  }
+
   // Indicates whether or not the code in the shared function support
   // deoptimization.
   inline bool has_deoptimization_support();
@@ -7396,6 +7407,7 @@ class SharedFunctionInfo: public HeapObject {
     kDontFlush,
     kIsGenerator,
     kIsArrow,
+    kIsConciseMethod,
     kCompilerHintsCount  // Pseudo entry
   };