[interpreter] Support for ES6 super keyword.

src/interpreter/bytecode-register-allocator.cc

Index: src/interpreter/bytecode-register-allocator.cc
diff --git a/src/interpreter/bytecode-register-allocator.cc b/src/interpreter/bytecode-register-allocator.cc
index 0a617c048acb17176df0f5693dead235dc42e271..b15248f485d697214c4a34d44d84725821750282 100644
--- a/src/interpreter/bytecode-register-allocator.cc
+++ b/src/interpreter/bytecode-register-allocator.cc
@@ -224,6 +224,14 @@ Register BytecodeRegisterAllocator::NextConsecutiveRegister() {
   return Register(next_consecutive_register_++);
 }
 
+void BytecodeRegisterAllocator::PrepareAndInitializeConsecutiveAllocations(
+    Register* registers, size_t count) {
+  PrepareForConsecutiveAllocations(count);
+  for (size_t i = 0; i < count; i++) {
+    registers[i] = NextConsecutiveRegister();
+  }
+}
+
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8