LayoutTests for writing empty Blob/File/FileList to IndexedDB.

LayoutTests/storage/indexeddb/blob-basics-metadata-expected.txt

Index: LayoutTests/storage/indexeddb/blob-basics-metadata-expected.txt
diff --git a/LayoutTests/storage/indexeddb/blob-basics-metadata-expected.txt b/LayoutTests/storage/indexeddb/blob-basics-metadata-expected.txt
index b9d3b31d89c89b127042b2547cf03878caefc6c1..9d8b5d3728affd6a50433384aef578df546d75c3 100644
--- a/LayoutTests/storage/indexeddb/blob-basics-metadata-expected.txt
+++ b/LayoutTests/storage/indexeddb/blob-basics-metadata-expected.txt
@@ -17,6 +17,7 @@ test_content = 'This is a test. This is only a test.'
 blob = new Blob([test_content])
 
 validateResult(blob):
+PASS blob.size == test_content.length is true
 transaction = db.transaction('storeName', 'readwrite')
 store = transaction.objectStore('storeName')
 store.put(blob, 'blobkey')
@@ -29,6 +30,7 @@ testFile():
 file = fileInput.files[0]
 
 validateResult(file):
+PASS file.name == fileInput.files[0].name is true
 transaction = db.transaction('storeName', 'readwrite')
 store = transaction.objectStore('storeName')
 store.put(file, 'filekey')
@@ -41,6 +43,7 @@ testFileList():
 filelist = fileInput.files
 
 validateResult(filelist):
+PASS filelist[1].name == fileInput.files[1].name is true
 transaction = db.transaction('storeName', 'readwrite')
 store = transaction.objectStore('storeName')
 store.put(filelist, 'filelistkey')