NewError no longer returns a MaybeObject.

src/isolate.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_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include <queue>
 #include "include/v8-debug.h"
 #include "src/allocation.h"
@@ skipping 119 matching lines @@
     }                                                                \
   } while (false)
 
 #define ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, dst, call)  \
   ASSIGN_RETURN_ON_EXCEPTION_VALUE(                             \
       isolate, dst, call, isolate->heap()->exception())
 
 #define ASSIGN_RETURN_ON_EXCEPTION(isolate, dst, call, T)  \
   ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, dst, call, MaybeHandle<T>())
 
-#define THROW_NEW_ERROR(isolate, call, T)                                    \
-  do {                                                                       \
-    Handle<Object> __error__;                                                \
-    ASSIGN_RETURN_ON_EXCEPTION(isolate, __error__, isolate->factory()->call, \
-                               T);                                           \
-    return isolate->Throw<T>(__error__);                                     \
+#define THROW_NEW_ERROR(isolate, call, T)               \
+  do {                                                  \
+    return isolate->Throw<T>(isolate->factory()->call); \
   } while (false)
 
-#define THROW_NEW_ERROR_RETURN_FAILURE(isolate, call)             \
-  do {                                                            \
-    Handle<Object> __error__;                                     \
-    ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, __error__,        \
-                                       isolate->factory()->call); \
-    return isolate->Throw(*__error__);                            \
+#define THROW_NEW_ERROR_RETURN_FAILURE(isolate, call) \
+  do {                                                \
+    return isolate->Throw(*isolate->factory()->call); \
   } while (false)
 
 #define RETURN_ON_EXCEPTION_VALUE(isolate, call, value)            \
   do {                                                             \
     if ((call).is_null()) {                                        \
       DCHECK((isolate)->has_pending_exception());                  \
       return value;                                                \
     }                                                              \
   } while (false)
 
@@ skipping 1417 matching lines @@
   }
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_