drive: FileCache::Store marks the entry as dirty if empty MD5 is given

chrome/browser/chromeos/drive/file_system/download_operation_unittest.cc

Index: chrome/browser/chromeos/drive/file_system/download_operation_unittest.cc
diff --git a/chrome/browser/chromeos/drive/file_system/download_operation_unittest.cc b/chrome/browser/chromeos/drive/file_system/download_operation_unittest.cc
index a706a37deb8152baa366b83907b2a258a7ac7ef0..043f5fc1609b12a94402cfaef904fbdb48928b4e 100644
--- a/chrome/browser/chromeos/drive/file_system/download_operation_unittest.cc
+++ b/chrome/browser/chromeos/drive/file_system/download_operation_unittest.cc
@@ -4,7 +4,6 @@
 
 #include "chrome/browser/chromeos/drive/file_system/download_operation.h"
 
-#include "base/callback_helpers.h"
 #include "base/file_util.h"
 #include "base/task_runner_util.h"
 #include "chrome/browser/chromeos/drive/fake_free_disk_space_getter.h"
@@ -427,23 +426,12 @@ TEST_F(DownloadOperationTest, EnsureFileDownloadedByPath_DirtyCache) {
       base::Bind(&internal::FileCache::Store,
                  base::Unretained(cache()),
                  GetLocalId(file_in_root),
-                 src_entry.file_specific_info().md5(),
+                 std::string(),
                  dirty_file,
                  internal::FileCache::FILE_OPERATION_COPY),
       google_apis::test_util::CreateCopyResultCallback(&error));
   test_util::RunBlockingPoolTask();
   EXPECT_EQ(FILE_ERROR_OK, error);
-  scoped_ptr<base::ScopedClosureRunner> file_closer;
-  base::PostTaskAndReplyWithResult(
-      blocking_task_runner(),
-      FROM_HERE,
-      base::Bind(&internal::FileCache::OpenForWrite,
-                 base::Unretained(cache()),
-                 GetLocalId(file_in_root),
-                 &file_closer),
-      google_apis::test_util::CreateCopyResultCallback(&error));
-  test_util::RunBlockingPoolTask();
-  EXPECT_EQ(FILE_ERROR_OK, error);
 
   // Record values passed to GetFileContentInitializedCallback().
   FileError init_error;