Change Has* and Get*Attributes to return Maybe<*>, indicating possible exceptions.

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 "include/v8-debug.h"
 #include "src/allocation.h"
 #include "src/assert-scope.h"
@@ skipping 88 matching lines @@
 #define RETURN_FAILURE_IF_SCHEDULED_EXCEPTION(isolate)    \
   do {                                                    \
     Isolate* __isolate__ = (isolate);                     \
     if (__isolate__->has_scheduled_exception()) {         \
       return __isolate__->PromoteScheduledException();    \
     }                                                     \
   } while (false)
 
 // Macros for MaybeHandle.
 
-#define RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, T)  \
-  do {                                                       \
-    Isolate* __isolate__ = (isolate);                        \
-    if (__isolate__->has_scheduled_exception()) {            \
-      __isolate__->PromoteScheduledException();              \
-      return MaybeHandle<T>();                               \
-    }                                                        \
+#define RETURN_VALUE_IF_SCHEDULED_EXCEPTION(isolate, value) \
+  do {                                                      \
+    Isolate* __isolate__ = (isolate);                       \
+    if (__isolate__->has_scheduled_exception()) {           \
+      __isolate__->PromoteScheduledException();             \
+      return value;                                         \
+    }                                                       \
   } while (false)
 
+#define RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, T) \
+  RETURN_VALUE_IF_SCHEDULED_EXCEPTION(isolate, MaybeHandle<T>())
+
 #define ASSIGN_RETURN_ON_EXCEPTION_VALUE(isolate, dst, call, value)  \
   do {                                                               \
     if (!(call).ToHandle(&dst)) {                                    \
       ASSERT((isolate)->has_pending_exception());                    \
       return value;                                                  \
     }                                                                \
   } while (false)
 
 #define ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, dst, call)  \
   ASSIGN_RETURN_ON_EXCEPTION_VALUE(                             \
@@ skipping 1400 matching lines @@
   }
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ISOLATE_H_