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

content/common/fileapi/webblobregistry_impl.cc

Index: content/common/fileapi/webblobregistry_impl.cc
===================================================================
--- content/common/fileapi/webblobregistry_impl.cc	(revision 138789)
+++ content/common/fileapi/webblobregistry_impl.cc	(working copy)
@@ -39,8 +39,6 @@
       case WebBlobData::Item::TypeData: {
         // WebBlobData does not allow partial data items.
         DCHECK(!data_item.offset && data_item.length == -1);
-        if (data_item.data.size() == 0)
-          break;
         if (data_item.data.size() < kLargeThresholdBytes) {
           item.SetToData(data_item.data.data(), data_item.data.size());
           child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
@@ -66,14 +64,12 @@
         break;
       }
       case WebBlobData::Item::TypeFile:
-        if (data_item.length) {
-          item.SetToFile(
-              webkit_glue::WebStringToFilePath(data_item.filePath),
-              static_cast<uint64>(data_item.offset),
-              static_cast<uint64>(data_item.length),
-              base::Time::FromDoubleT(data_item.expectedModificationTime));
-          child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
-        }
+        item.SetToFile(
+            webkit_glue::WebStringToFilePath(data_item.filePath),
+            static_cast<uint64>(data_item.offset),
+            static_cast<uint64>(data_item.length),
+            base::Time::FromDoubleT(data_item.expectedModificationTime));
+        child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
         break;
       case WebBlobData::Item::TypeBlob:
         if (data_item.length) {
@@ -81,8 +77,8 @@
               data_item.blobURL,
               static_cast<uint64>(data_item.offset),
               static_cast<uint64>(data_item.length));
-          child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
         }
+        child_thread_->Send(new BlobHostMsg_AppendBlobDataItem(url, item));
         break;
       default:
         NOTREACHED();