A bunch of remaining parts of extension content verification (Reland)

extensions/browser/content_verify_job.cc

 // Copyright 2014 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 "extensions/browser/content_verify_job.h"
 
 #include <algorithm>
 
 #include "base/stl_util.h"
 #include "base/task_runner_util.h"
@@ skipping 103 matching lines @@
 
   if (*expected_hash != final)
     return DispatchFailureCallback(HASH_MISMATCH);
 
   current_hash_.reset();
   current_hash_byte_count_ = 0;
   current_block_++;
 }
 
 void ContentVerifyJob::OnHashesReady(bool success) {
-  if (!success)
+  if (!success && !g_test_delegate)
     return DispatchFailureCallback(NO_HASHES);
 
   hashes_ready_ = true;
   if (!queue_.empty()) {
     std::string tmp;
     queue_.swap(tmp);
     BytesRead(tmp.size(), string_as_array(&tmp));
   }
   if (done_reading_)
     FinishBlock();
 }
 
 // static
 void ContentVerifyJob::SetDelegateForTests(TestDelegate* delegate) {
   g_test_delegate = delegate;
 }
 
 void ContentVerifyJob::DispatchFailureCallback(FailureReason reason) {
   if (!failure_callback_.is_null()) {
     failure_callback_.Run(reason);
     failure_callback_.Reset();
   }
 }
 
 }  // namespace extensions