[FileSystem] Add another copy-or-move validation hook for post-write.

chrome/browser/media_galleries/fileapi/media_file_validator_factory.cc

Index: chrome/browser/media_galleries/fileapi/media_file_validator_factory.cc
diff --git a/chrome/browser/media_galleries/fileapi/media_file_validator_factory.cc b/chrome/browser/media_galleries/fileapi/media_file_validator_factory.cc
index 7afab9f983b219b207b3070ce54436e025302e43..eedb26be1fcb45259d25b5f1c1c8a0f9e8dfbbc6 100644
--- a/chrome/browser/media_galleries/fileapi/media_file_validator_factory.cc
+++ b/chrome/browser/media_galleries/fileapi/media_file_validator_factory.cc
@@ -9,6 +9,7 @@
 #include "chrome/browser/media_galleries/fileapi/supported_image_type_validator.h"
 #include "webkit/browser/fileapi/copy_or_move_file_validator.h"
 #include "webkit/browser/fileapi/file_system_url.h"
+#include "webkit/common/blob/shareable_file_reference.h"
 
 namespace chrome {
 
@@ -23,6 +24,13 @@ class InvalidFileValidator : public fileapi::CopyOrMoveFileValidator {
     result_callback.Run(base::PLATFORM_FILE_ERROR_SECURITY);
   }
 
+  virtual void StartPostWriteValidation(
+      const base::FilePath& dest_platform_path,
+      const fileapi::CopyOrMoveFileValidator::ResultCallback&
+          result_callback) OVERRIDE {
+    result_callback.Run(base::PLATFORM_FILE_ERROR_SECURITY);
+  }
+
  private:
   friend class chrome::MediaFileValidatorFactory;