AU: HTTP success is not just 200, but anything in the 2xx range

http_fetcher_unittest.cc

 // Copyright (c) 2009 The Chromium OS 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 <unistd.h>
 #include <string>
 #include <vector>
 #include <base/scoped_ptr.h>
 #include <glib.h>
 #include <gtest/gtest.h>
@@ skipping 321 matching lines @@
 }
 
 namespace {
 class FlakyHttpFetcherTestDelegate : public HttpFetcherDelegate {
  public:
   virtual void ReceivedBytes(HttpFetcher* fetcher,
                              const char* bytes, int length) {
     data.append(bytes, length);
   }
   virtual void TransferComplete(HttpFetcher* fetcher, bool successful) {
+    EXPECT_TRUE(successful);
     g_main_loop_quit(loop_);
   }
   string data;
   GMainLoop* loop_;
 };
 }  // namespace {}
 
 TYPED_TEST(HttpFetcherTest, FlakyTest) {
   if (this->IsMock())
     return;
@@ skipping 89 matching lines @@
 
     g_timeout_add(0, StartTransfer, &start_xfer_args);
     g_main_loop_run(loop);
 
     // Exiting and testing happens in the delegate
   }
   g_main_loop_unref(loop);
 }
 
 }  // namespace chromeos_update_engine