********** Chromium Blob hacking

content/common/fileapi/webfilewriter_impl.cc

Index: content/common/fileapi/webfilewriter_impl.cc
===================================================================
--- content/common/fileapi/webfilewriter_impl.cc	(revision 171309)
+++ content/common/fileapi/webfilewriter_impl.cc	(working copy)
@@ -23,10 +23,14 @@
   }
   virtual ~CallbackDispatcher() {
   }
-
-  virtual void DidReadMetadata(const base::PlatformFileInfo&, const FilePath&) {
+  virtual void DidReadMetadata(
+      const base::PlatformFileInfo&, const FilePath&) {
     NOTREACHED();
   }
+  virtual void DidCreateSnapshotFile(
+      const base::PlatformFileInfo&, const FilePath&) {
+    NOTREACHED();
+  }
   virtual void DidReadDirectory(
       const std::vector<base::FileUtilProxy::Entry>& entries,
       bool has_more) {
@@ -69,9 +73,9 @@
 }
 
 void WebFileWriterImpl::DoWrite(
-    const GURL& path, const GURL& blob_url, int64 offset) {
+    const GURL& path, const std::string& blob_uuid, int64 offset) {
   GetFileSystemDispatcher()->Write(
-      path, blob_url, offset, &request_id_,
+      path, blob_uuid, offset, &request_id_,
       new CallbackDispatcher(AsWeakPtr()));
 }