Remove get from CrossThreadPersistent to avoid accidental use

third_party/WebKit/Source/modules/webdatabase/DatabaseThread.cpp

Index: third_party/WebKit/Source/modules/webdatabase/DatabaseThread.cpp
diff --git a/third_party/WebKit/Source/modules/webdatabase/DatabaseThread.cpp b/third_party/WebKit/Source/modules/webdatabase/DatabaseThread.cpp
index 0fe57779d626c97a50d2be7e6cbd5196211625da..505a7e18ca751cae68c2c038cc83da88211093e3 100644
--- a/third_party/WebKit/Source/modules/webdatabase/DatabaseThread.cpp
+++ b/third_party/WebKit/Source/modules/webdatabase/DatabaseThread.cpp
@@ -153,6 +153,14 @@ bool DatabaseThread::isDatabaseOpen(Database* database)
     return !m_terminationRequested && m_openDatabaseSet.contains(database);
 }
 
+bool DatabaseThread::isDatabaseOpen(CrossThreadPersistent<Database> database)
+{
+    DCHECK(isDatabaseThread());
+    DCHECK(database);
+    MutexLocker lock(m_terminationRequestedMutex);
+    return !m_terminationRequested && m_openDatabaseSet.contains(database);
+}
+
 bool DatabaseThread::isDatabaseThread() const
 {
     // This function is called only from the main thread or the database