AU: Try delta updates first, then full updates

src/platform/update_engine/action_pipe_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 <string>
 #include <gtest/gtest.h>
 #include "update_engine/action.h"
 #include "update_engine/action_pipe.h"
 
+using std::string;
+
 namespace chromeos_update_engine {
 
 using chromeos_update_engine::ActionPipe;
 
 class ActionPipeTestAction;
 
 template<>
 class ActionTraits<ActionPipeTestAction> {
  public:
   typedef string OutputObjectType;
@@ skipping 15 matching lines @@
 // This test creates two simple Actions and sends a message via an ActionPipe
 // from one to the other.
 TEST(ActionPipeTest, SimpleTest) {
   ActionPipeTestAction a, b;
   BondActions(&a, &b);
   a.out_pipe()->set_contents("foo");
   EXPECT_EQ("foo", b.in_pipe()->contents());
 }
 
 }  // namespace chromeos_update_engine