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

webkit/browser/fileapi/copy_or_move_file_validator_unittest.cc

Index: webkit/browser/fileapi/copy_or_move_file_validator_unittest.cc
diff --git a/webkit/browser/fileapi/copy_or_move_file_validator_unittest.cc b/webkit/browser/fileapi/copy_or_move_file_validator_unittest.cc
index b971fd57c1a9f0f72b517fc1a3e186d78b76e71c..45c66af4ccd04a4d631c7568fd195b0b621c8fd9 100644
--- a/webkit/browser/fileapi/copy_or_move_file_validator_unittest.cc
+++ b/webkit/browser/fileapi/copy_or_move_file_validator_unittest.cc
@@ -18,6 +18,7 @@
 #include "webkit/browser/fileapi/mock_file_system_context.h"
 #include "webkit/browser/fileapi/test_mount_point_provider.h"
 #include "webkit/browser/quota/mock_special_storage_policy.h"
+#include "webkit/common/blob/shareable_file_reference.h"
 #include "webkit/common/fileapi/file_system_util.h"
 
 namespace fileapi {
@@ -196,7 +197,9 @@ class TestCopyOrMoveFileValidatorFactory
    public:
     explicit TestCopyOrMoveFileValidator(bool all_valid)
         : result_(all_valid ? base::PLATFORM_FILE_OK
-                            : base::PLATFORM_FILE_ERROR_SECURITY) {
+                            : base::PLATFORM_FILE_ERROR_SECURITY),
+          write_result_(all_valid ? base::PLATFORM_FILE_OK
+                                  : base::PLATFORM_FILE_ERROR_SECURITY) {
     }
     virtual ~TestCopyOrMoveFileValidator() {}
 
@@ -207,8 +210,18 @@ class TestCopyOrMoveFileValidatorFactory
           FROM_HERE, base::Bind(result_callback, result_));
     }
 
+    virtual void StartPostWriteValidation(
+        const base::FilePath& dest_platform_path,
+        scoped_refptr<webkit_blob::ShareableFileReference> file_ref,
+        const ResultCallback& result_callback) OVERRIDE {
+      // Post the result since a real validator must do work asynchronously.
+      base::MessageLoop::current()->PostTask(
+          FROM_HERE, base::Bind(result_callback, write_result_));
+    }
+
    private:
     base::PlatformFileError result_;
+    base::PlatformFileError write_result_;
 
     DISALLOW_COPY_AND_ASSIGN(TestCopyOrMoveFileValidator);
   };