[oilpan]: Add SafePointAwareMutexLocker to allow GC when waiting for lock.

Source/modules/webdatabase/sqlite/SQLiteFileSystem.cpp

Index: Source/modules/webdatabase/sqlite/SQLiteFileSystem.cpp
diff --git a/Source/modules/webdatabase/sqlite/SQLiteFileSystem.cpp b/Source/modules/webdatabase/sqlite/SQLiteFileSystem.cpp
index 9c13abbf0103334a97b0c552e4bca9fbc13c9c20..0cad590172834343319cf3d25ef582e2ba2e0ba7 100644
--- a/Source/modules/webdatabase/sqlite/SQLiteFileSystem.cpp
+++ b/Source/modules/webdatabase/sqlite/SQLiteFileSystem.cpp
@@ -31,6 +31,7 @@
 #include "config.h"
 #include "modules/webdatabase/sqlite/SQLiteFileSystem.h"
 
+#include "platform/heap/Handle.h"
 #include <sqlite3.h>
 #include "wtf/text/CString.h"
 
@@ -44,6 +45,7 @@ SQLiteFileSystem::SQLiteFileSystem()
 
 int SQLiteFileSystem::openDatabase(const String& filename, sqlite3** database, bool forWebSQLDatabase)
 {
+    ThreadState::SafePointScope scope(ThreadState::HeapPointersOnStack);
     if (!forWebSQLDatabase)
         return sqlite3_open(filename.utf8().data(), database);