IndexedDB: Remove unused plumbing for string version changes

content/common/indexed_db/indexed_db_dispatcher.cc

Index: content/common/indexed_db/indexed_db_dispatcher.cc
diff --git a/content/common/indexed_db/indexed_db_dispatcher.cc b/content/common/indexed_db/indexed_db_dispatcher.cc
index 4844b749ed6af1ef44b2902f954230331d3d400a..1a14bff01e1a10de10c43907b638b630a35045cd 100644
--- a/content/common/indexed_db/indexed_db_dispatcher.cc
+++ b/content/common/indexed_db/indexed_db_dispatcher.cc
@@ -159,8 +159,6 @@ void IndexedDBDispatcher::OnMessageReceived(const IPC::Message& msg) {
                         OnForcedClose)
     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksIntVersionChange,
                         OnIntVersionChange)
-    IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksVersionChange,
-                        OnVersionChange)
     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksAbort, OnAbort)
     IPC_MESSAGE_HANDLER(IndexedDBMsg_DatabaseCallbacksComplete, OnComplete)
     IPC_MESSAGE_UNHANDLED(handled = false)
@@ -769,19 +767,6 @@ void IndexedDBDispatcher::OnIntVersionChange(int32 ipc_thread_id,
   callbacks->onVersionChange(old_version, new_version);
 }
 
-void IndexedDBDispatcher::OnVersionChange(int32 ipc_thread_id,
-                                          int32 ipc_database_id,
-                                          const string16& newVersion) {
-  DCHECK_EQ(ipc_thread_id, CurrentWorkerId());
-  WebIDBDatabaseCallbacks* callbacks =
-      pending_database_callbacks_.Lookup(ipc_database_id);
-  // callbacks would be NULL if a versionchange event is received after close
-  // has been called.
-  if (!callbacks)
-    return;
-  callbacks->onVersionChange(newVersion);
-}
-
 void IndexedDBDispatcher::ResetCursorPrefetchCaches(
     int32 ipc_exception_cursor_id) {
   typedef std::map<int32, RendererWebIDBCursorImpl*>::iterator Iterator;