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

Source/modules/webdatabase/sqlite/SQLiteFileSystem.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "modules/webdatabase/sqlite/SQLiteFileSystem.h"
 
+#include "platform/heap/Handle.h"
 #include <sqlite3.h>
 #include "wtf/text/CString.h"
 
 // SQLiteFileSystem::registerSQLiteVFS() is implemented in the
 // platform-specific files SQLiteFileSystemChromium{Win|Posix}.cpp
 namespace WebCore {
 
 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);
 
     return sqlite3_open_v2(filename.utf8().data(), database, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, "chromium_vfs");
 }
 
 } // namespace WebCore