IndexedDB: Make DOMException messages more useful.

Source/modules/indexeddb/IDBTransaction.cpp

Index: Source/modules/indexeddb/IDBTransaction.cpp
diff --git a/Source/modules/indexeddb/IDBTransaction.cpp b/Source/modules/indexeddb/IDBTransaction.cpp
index f5c4c8d884ea67720fd038f00449e61e3b615e3e..b9a89782f00b6af21a80428ec1eb7a35ea9f16da 100644
--- a/Source/modules/indexeddb/IDBTransaction.cpp
+++ b/Source/modules/indexeddb/IDBTransaction.cpp
@@ -139,7 +139,7 @@ void IDBTransaction::setError(PassRefPtr<DOMError> error)
 PassRefPtr<IDBObjectStore> IDBTransaction::objectStore(const String& name, ExceptionState& es)
 {
     if (m_state == Finished) {
-        es.throwDOMException(InvalidStateError);
+        es.throwDOMException(InvalidStateError, IDBDatabase::transactionFinishedMessage);
         return 0;
     }
 
@@ -148,14 +148,14 @@ PassRefPtr<IDBObjectStore> IDBTransaction::objectStore(const String& name, Excep
         return it->value;
 
     if (!isVersionChange() && !m_objectStoreNames.contains(name)) {
-        es.throwDOMException(NotFoundError, IDBDatabase::notFoundErrorMessage);
+        es.throwDOMException(NotFoundError, IDBDatabase::noSuchObjectStoreMessage);
         return 0;
     }
 
     int64_t objectStoreId = m_database->findObjectStoreId(name);
     if (objectStoreId == IDBObjectStoreMetadata::InvalidId) {
         ASSERT(isVersionChange());
-        es.throwDOMException(NotFoundError, IDBDatabase::notFoundErrorMessage);
+        es.throwDOMException(NotFoundError, IDBDatabase::noSuchObjectStoreMessage);
         return 0;
     }
 
@@ -204,7 +204,7 @@ void IDBTransaction::setActive(bool active)
 void IDBTransaction::abort(ExceptionState& es)
 {
     if (m_state == Finishing || m_state == Finished) {
-        es.throwDOMException(InvalidStateError);
+        es.throwDOMException(InvalidStateError, IDBDatabase::transactionFinishedMessage);
         return;
     }