Revert 138554 - Prevent zero-length items from being appended to a blob.

webkit/fileapi/file_system_operation_write_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // NOTE: These tests are run as part of "unit_tests" (in chrome/test/unit)
 // rather than as part of test_shell_tests because they rely on being able
 // to instantiate a MessageLoop of type TYPE_IO.  test_shell_tests uses
 // TYPE_UI, which URLRequest doesn't allow.
 //
 
@@ skipping 216 matching lines @@
   url_request_context.blob_storage_controller()->RemoveBlob(blob_url);
 
   EXPECT_EQ(14, bytes_written());
   EXPECT_EQ(base::PLATFORM_FILE_OK, status());
   EXPECT_TRUE(complete());
 }
 
 TEST_F(FileSystemOperationWriteTest, TestWriteZero) {
   GURL blob_url("blob:zero");
   scoped_refptr<webkit_blob::BlobData> blob_data(new webkit_blob::BlobData());
+  blob_data->AppendData("");
 
   TestURLRequestContext url_request_context;
   url_request_context.blob_storage_controller()->AddFinishedBlob(
       blob_url, blob_data);
 
   operation()->Write(&url_request_context, URLForPath(virtual_path_),
                      blob_url, 0, RecordWriteCallback());
   MessageLoop::current()->Run();
 
   url_request_context.blob_storage_controller()->RemoveBlob(blob_url);
@@ skipping 140 matching lines @@
   // so nothing should have happen.
   EXPECT_EQ(0, bytes_written());
   EXPECT_EQ(base::PLATFORM_FILE_ERROR_ABORT, status());
   EXPECT_EQ(base::PLATFORM_FILE_OK, cancel_status());
   EXPECT_TRUE(complete());
 }
 
 // TODO(ericu,dmikurube,kinuko): Add more tests for cancel cases.
 
 }  // namespace fileapi