Split Dictionary's get and convert into DictionaryHelper.

Source/modules/filesystem/FileSystemFlags.h

Index: Source/modules/filesystem/FileSystemFlags.h
diff --git a/Source/modules/filesystem/FileSystemFlags.h b/Source/modules/filesystem/FileSystemFlags.h
index 0108c520feeeca19ecabad0d37030a69986d414f..05f656cc72fef68c05671623d1069afc41fc497d 100644
--- a/Source/modules/filesystem/FileSystemFlags.h
+++ b/Source/modules/filesystem/FileSystemFlags.h
@@ -32,6 +32,7 @@
 #define FileSystemFlags_h
 
 #include "bindings/core/v8/Dictionary.h"
+#include "bindings/core/v8/DictionaryHelper.h"
 
 namespace WebCore {
 
@@ -40,8 +41,8 @@ struct FileSystemFlags  {
         : create(false)
         , exclusive(false)
     {
-        options.get("create", create);
-        options.get("exclusive", exclusive);
+        DictionaryHelper::get(options, "create", create);
+        DictionaryHelper::get(options, "exclusive", exclusive);
     }
 
     bool create;