Improve 'XMLHttpRequest' exception messages.

Source/bindings/v8/ExceptionMessages.cpp

Index: Source/bindings/v8/ExceptionMessages.cpp
diff --git a/Source/bindings/v8/ExceptionMessages.cpp b/Source/bindings/v8/ExceptionMessages.cpp
index 15c7f28eb87c63553e4a9e7ba5c2d2414d5a9c43..f71b29ce6868e28fd845fe05e090036bd129c5c4 100644
--- a/Source/bindings/v8/ExceptionMessages.cpp
+++ b/Source/bindings/v8/ExceptionMessages.cpp
@@ -38,4 +38,14 @@ String ExceptionMessages::failedToExecute(const String& method, const String& ty
     return "Failed to execute '" + method + "' on '" + type + "': " + detail;
 }
 
+String ExceptionMessages::failedToGet(const String& property, const String& type, const String& detail)
+{
+    return "Failed to read the '" + property + "' property from '" + type + "': " + detail;
+}
+
+String ExceptionMessages::failedToSet(const String& property, const String& type, const String& detail)
+{
+    return "Failed to set the '" + property + "' property on '" + type + "': " + detail;
+}
+
 } // namespace WebCore