[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..862518670d338c289c43a6f35ad08ae15e31b35e 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 {
 
@@ -17,7 +18,14 @@ namespace {
 class InvalidFileValidator : public fileapi::CopyOrMoveFileValidator {
  public:
   virtual ~InvalidFileValidator() {}
-  virtual void StartValidation(
+  virtual void StartPreWriteValidation(
+      const fileapi::CopyOrMoveFileValidator::ResultCallback&
+          result_callback) OVERRIDE {
+    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);