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

webkit/blob/blob_url_request_job_factory.cc

 // Copyright (c) 2011 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.
 
 #include "webkit/blob/blob_url_request_job_factory.h"
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/message_loop_proxy.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_job_factory.h"
-#include "webkit/blob/blob_storage_controller.h"
+#include "webkit/blob/blob_storage_context.h"
 #include "webkit/blob/blob_url_request_job.h"
 #include "webkit/fileapi/file_system_context.h"
 
 namespace webkit_blob {
 
+namespace {
+int kUserDataKey;
+
+BlobDataHandle* GetRequestedBlobDataHandle(net::URLRequest* request) {
+  return reinterpret_cast<BlobDataHandle*>(
+      request->GetUserData(&kUserDataKey));
+}
+}  // namespace
+
+void BlobProtocolHandler::SetRequestedBlobDataHandle(
+    net::URLRequest* request,
+    scoped_ptr<BlobDataHandle> blob_data_handle) {
+  // The request takes ownership
+  request->SetUserData(&kUserDataKey, blob_data_handle.release()); 
+}
+
 BlobProtocolHandler::BlobProtocolHandler(
-    webkit_blob::BlobStorageController* blob_storage_controller,
+    webkit_blob::BlobStorageContext* blob_storage_context,
     fileapi::FileSystemContext* file_system_context,
     base::MessageLoopProxy* loop_proxy)
-    : blob_storage_controller_(blob_storage_controller),
-      file_system_context_(file_system_context),
+    : file_system_context_(file_system_context),
       file_loop_proxy_(loop_proxy) {
-  DCHECK(blob_storage_controller_);
-  DCHECK(file_system_context_);
-  DCHECK(file_loop_proxy_);
 }
 
 BlobProtocolHandler::~BlobProtocolHandler() {}
 
 net::URLRequestJob* BlobProtocolHandler::MaybeCreateJob(
     net::URLRequest* request, net::NetworkDelegate* network_delegate) const {
-  scoped_refptr<webkit_blob::BlobData> data = LookupBlobData(request);
-  if (!data) {
-    // This request is not coming through resource dispatcher host.
-    data = blob_storage_controller_->GetBlobDataFromUrl(request->url());
-  }
   return new webkit_blob::BlobURLRequestJob(
-      request, network_delegate, data, file_system_context_, file_loop_proxy_);
+      request, network_delegate, LookupBlobData(request), file_system_context_, file_loop_proxy_);
 }
 
 scoped_refptr<webkit_blob::BlobData>
 BlobProtocolHandler::LookupBlobData(net::URLRequest* request) const {
+  // We don't lookup based on the requested url. The caller is responsible for
+  // Setting up what blob to retrieve by calling SetRequestedBlobDataHandle prior
+  // to starting the URLRequest.
+  BlobDataHandle* blob_data_handle = GetRequestedBlobDataHandle(request);
+  if (blob_data_handle)
+    return blob_data_handle->data();
   return NULL;
 }
 
 }  // namespace webkit_blob