Convert JsonWriter::Write to taking a const ref for the in-param

remoting/host/policy_watcher_unittest.cc

 // Copyright 2015 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 "base/basictypes.h"
 #include "base/bind.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/test/mock_log.h"
 #include "base/thread_task_runner_handle.h"
 #include "components/policy/core/common/fake_async_policy_loader.h"
 #include "policy/policy_constants.h"
 #include "remoting/host/dns_blackhole_checker.h"
 #include "remoting/host/policy_watcher.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace remoting {
 
 namespace key = ::policy::key;
 
 MATCHER_P(IsPolicies, dict, "") {
   bool equal = arg->Equals(dict);
   if (!equal) {
     std::string actual_value;
     base::JSONWriter::WriteWithOptions(
-        arg, base::JSONWriter::OPTIONS_PRETTY_PRINT, &actual_value);
+        *arg, base::JSONWriter::OPTIONS_PRETTY_PRINT, &actual_value);
 
     std::string expected_value;
     base::JSONWriter::WriteWithOptions(
-        dict, base::JSONWriter::OPTIONS_PRETTY_PRINT, &expected_value);
+        *dict, base::JSONWriter::OPTIONS_PRETTY_PRINT, &expected_value);
 
     *result_listener << "Policies are not equal. ";
     *result_listener << "Expected policy: " << expected_value << ". ";
     *result_listener << "Actual policy: " << actual_value << ".";
   }
   return equal;
 }
 
 class MockPolicyCallback {
  public:
@@ skipping 698 matching lines @@
   }
 
   // Today, the only verification offered by this test is:
   // - Manual verification of policy values dumped by OnPolicyUpdatedDumpPolicy
   // - Automated verification that nothing crashed
 }
 
 #endif
 
 }  // namespace remoting