Have Dictionary use V8TRYCATCH_FOR_V8STRINGRESOURCE() macro

Source/bindings/v8/V8BindingMacros.h

Index: Source/bindings/v8/V8BindingMacros.h
diff --git a/Source/bindings/v8/V8BindingMacros.h b/Source/bindings/v8/V8BindingMacros.h
index 53416e5e654f11c8f4b597e0d62973612d22ef2f..5f194123e54d36d1dd42b274da4451b55fa96d47 100644
--- a/Source/bindings/v8/V8BindingMacros.h
+++ b/Source/bindings/v8/V8BindingMacros.h
@@ -85,10 +85,13 @@ namespace WebCore {
         }                                                         \
     }
 
+#define V8TRYCATCH_FOR_V8STRINGRESOURCE_RETURN(type, var, value, retVal) \
+    type var(value);                                                     \
+    if (!var.prepare())                                                  \
+        return retVal;
+
 #define V8TRYCATCH_FOR_V8STRINGRESOURCE(type, var, value) \
-    type var(value);                                            \
-    if (!var.prepare())                                         \
-        return v8::Undefined();
+    V8TRYCATCH_FOR_V8STRINGRESOURCE_RETURN(type, var, value, v8::Undefined());
 
 #define V8TRYCATCH_FOR_V8STRINGRESOURCE_VOID(type, var, value) \
     type var(value);                                                 \