IDL: Fix exception handling when converting V8 value to union/dictionary

Source/bindings/core/v8/V8BindingMacros.h

Index: Source/bindings/core/v8/V8BindingMacros.h
diff --git a/Source/bindings/core/v8/V8BindingMacros.h b/Source/bindings/core/v8/V8BindingMacros.h
index 320cff6709bc0214451db6363bb4e03dfc294f1f..42556c5cbec3e8e00c79676fbe4ec526d9665e67 100644
--- a/Source/bindings/core/v8/V8BindingMacros.h
+++ b/Source/bindings/core/v8/V8BindingMacros.h
@@ -99,11 +99,22 @@ namespace blink {
     if (UNLIKELY(exceptionState.throwIfNeeded()))                       \
         return;
 
+#define TONATIVE_VOID_EXCEPTIONSTATE_NOTHROW(type, var, value, exceptionState) \
+    type var;                                                                  \
+    var = (value);                                                             \
+    if (UNLIKELY(exceptionState.hadException()))                               \
+        return;
+
 #define TONATIVE_VOID_EXCEPTIONSTATE_ARGINTERNAL(value, exceptionState) \
     (value);                                                            \
     if (UNLIKELY(exceptionState.throwIfNeeded()))                       \
         return;
 
+#define TONATIVE_VOID_EXCEPTIONSTATE_ARGINTERNAL_NOTHROW(value, exceptionState) \
+    (value);                                                                    \
+    if (UNLIKELY(exceptionState.hadException()))                                \
+        return;
+
 #define TONATIVE_DEFAULT_EXCEPTIONSTATE(type, var, value, exceptionState, retVal) \
     type var = (value);                                                           \
     if (UNLIKELY(exceptionState.throwIfNeeded()))                                 \