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

chrome/browser/chromeos/login/users/avatar/user_image_manager_browsertest.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 <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 638 matching lines @@
       run_loop_->Quit();
   }
 
   std::string ConstructPolicy(const std::string& relative_path) {
     std::string image_data;
     if (!base::ReadFileToString(test_data_dir_.Append(relative_path),
                                 &image_data)) {
       ADD_FAILURE();
     }
     std::string policy;
-    base::JSONWriter::Write(policy::test::ConstructExternalDataReference(
-        embedded_test_server()->GetURL(std::string("/") + relative_path).spec(),
-        image_data).get(),
-        &policy);
+    base::JSONWriter::Write(*policy::test::ConstructExternalDataReference(
+                                embedded_test_server()
+                                    ->GetURL(std::string("/") + relative_path)
+                                    .spec(),
+                                image_data),
+                            &policy);
     return policy;
   }
 
   policy::UserPolicyBuilder user_policy_;
   FakeSessionManagerClient* fake_session_manager_client_;
 
   scoped_ptr<gfx::ImageSkia> policy_image_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(UserImageManagerPolicyTest);
@@ skipping 212 matching lines @@
 
   saved_image = test::ImageLoader(GetUserImagePath(kTestUser1, "jpg")).Load();
   ASSERT_TRUE(saved_image);
 
   // Check image dimensions. Images can't be compared since JPEG is lossy.
   EXPECT_EQ(policy_image_->width(), saved_image->width());
   EXPECT_EQ(policy_image_->height(), saved_image->height());
 }
 
 }  // namespace chromeos