Port messages sent by WebIDBFactoryImpl to Mojo.

third_party/WebKit/Source/modules/indexeddb/IDBRequest.cpp

Index: third_party/WebKit/Source/modules/indexeddb/IDBRequest.cpp
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBRequest.cpp b/third_party/WebKit/Source/modules/indexeddb/IDBRequest.cpp
index c5e2aaad76bed544144475b772879f56b7edfb2a..8489d2300017bc2a975ebfe9945fc0f5526afa80 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBRequest.cpp
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBRequest.cpp
@@ -42,6 +42,7 @@
 #include "modules/indexeddb/IDBEventDispatcher.h"
 #include "modules/indexeddb/IDBTracing.h"
 #include "modules/indexeddb/IDBValue.h"
+#include "modules/indexeddb/WebIDBCallbacksImpl.h"
 #include "platform/SharedBuffer.h"
 #include "public/platform/WebBlobInfo.h"
 #include <memory>
@@ -131,6 +132,20 @@ const String& IDBRequest::readyState() const
     return IndexedDBNames::done;
 }
 
+std::unique_ptr<WebIDBCallbacks> IDBRequest::createWebCallbacks()
+{
+    DCHECK(!m_webCallbacks);
+    std::unique_ptr<WebIDBCallbacks> callbacks = WebIDBCallbacksImpl::create(this);
+    m_webCallbacks = callbacks.get();
+    return callbacks;
+}
+
+void IDBRequest::webCallbacksDestroyed()
+{
+    DCHECK(m_webCallbacks);
+    m_webCallbacks = nullptr;
+}
+
 void IDBRequest::abort()
 {
     DCHECK(!m_requestAborted);
@@ -403,6 +418,10 @@ void IDBRequest::stop()
         m_result->contextWillBeDestroyed();
     if (m_pendingCursor)
         m_pendingCursor->contextWillBeDestroyed();
+    if (m_webCallbacks) {
+        m_webCallbacks->detach();
+        m_webCallbacks = nullptr;
+    }
 }
 
 const AtomicString& IDBRequest::interfaceName() const