[BlobAsync] Adding better error reporting and some new tests.

content/browser/blob_storage/blob_dispatcher_host.h

 // Copyright 2016 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.
 
 #ifndef CONTENT_BROWSER_BLOB_STORAGE_BLOB_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_BLOB_STORAGE_BLOB_DISPATCHER_HOST_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 69 matching lines @@
                            DecrementRefAfterOnStartWithHandle);
   FRIEND_TEST_ALL_PREFIXES(BlobDispatcherHostTest,
                            HostDisconnectAfterRegisterWithHandle);
   FRIEND_TEST_ALL_PREFIXES(BlobDispatcherHostTest, HostDisconnectAfterOnStart);
   FRIEND_TEST_ALL_PREFIXES(BlobDispatcherHostTest,
                            HostDisconnectAfterOnMemoryResponse);
   FRIEND_TEST_ALL_PREFIXES(BlobDispatcherHostTest,
                            CreateBlobWithBrokenReference);
   FRIEND_TEST_ALL_PREFIXES(BlobDispatcherHostTest,
                            DeferenceBlobOnDifferentHost);
+  FRIEND_TEST_ALL_PREFIXES(BlobDispatcherHostTest, BuildingReferenceChain);
+  FRIEND_TEST_ALL_PREFIXES(BlobDispatcherHostTest,
+                           BuildingReferenceChainWithCancel);
+  FRIEND_TEST_ALL_PREFIXES(BlobDispatcherHostTest,
+                           BuildingReferenceChainWithSourceDeath);
 
   typedef std::map<std::string, int> BlobReferenceMap;
 
   void OnRegisterBlobUUID(const std::string& uuid,
                           const std::string& content_type,
                           const std::string& content_disposition,
                           const std::set<std::string>& referenced_blob_uuids);
   void OnStartBuildingBlob(
       const std::string& uuid,
       const std::vector<storage::DataElement>& descriptions);
@@ skipping 33 matching lines @@
   // The set of public blob urls coined by this consumer.
   std::set<GURL> public_blob_urls_;
 
   scoped_refptr<ChromeBlobStorageContext> blob_storage_context_;
   storage::BlobAsyncBuilderHost async_builder_;
 
   DISALLOW_COPY_AND_ASSIGN(BlobDispatcherHost);
 };
 }  // namespace content
 #endif  // CONTENT_BROWSER_BLOB_STORAGE_BLOB_DISPATCHER_HOST_H_