Validate image files before writing them to media galleries.

webkit/fileapi/async_file_test_helper.h

Index: webkit/fileapi/async_file_test_helper.h
diff --git a/webkit/fileapi/async_file_test_helper.h b/webkit/fileapi/async_file_test_helper.h
index 9955b40e8520529d1d49f18acbd7408c8f6c815b..73d52c265d79a35f170cab2a5eccfe3750ae597d 100644
--- a/webkit/fileapi/async_file_test_helper.h
+++ b/webkit/fileapi/async_file_test_helper.h
@@ -9,6 +9,7 @@
 #include "webkit/fileapi/file_system_operation.h"
 #include "webkit/fileapi/file_system_types.h"
 #include "webkit/quota/quota_status_code.h"
+#include "webkit/storage/webkit_storage_export.h"
 
 namespace quota {
 class QuotaManager;
@@ -20,7 +21,7 @@ class FileSystemContext;
 class FileSystemURL;
 
 // A helper class to perform async file operations in a synchronous way.
-class AsyncFileTestHelper {
+class WEBKIT_STORAGE_EXPORT_PRIVATE AsyncFileTestHelper {
  public:
   typedef FileSystemOperation::FileEntryList FileEntryList;