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

extensions/browser/value_store/value_store_unittest.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/value_store/value_store_unittest.h"
 
 #include "base/json/json_writer.h"
 #include "base/memory/linked_ptr.h"
 #include "base/values.h"
 
 using content::BrowserThread;
 
 namespace {
 
 // To save typing ValueStore::DEFAULTS everywhere.
 const ValueStore::WriteOptions DEFAULTS = ValueStore::DEFAULTS;
 
 // Gets the pretty-printed JSON for a value.
 std::string GetJSON(const base::Value& value) {
   std::string json;
-  base::JSONWriter::WriteWithOptions(&value,
-                                     base::JSONWriter::OPTIONS_PRETTY_PRINT,
-                                     &json);
+  base::JSONWriter::WriteWithOptions(
+      value, base::JSONWriter::OPTIONS_PRETTY_PRINT, &json);
   return json;
 }
 
 }  // namespace
 
 // Compares two possibly NULL values for equality, filling |error| with an
 // appropriate error message if they're different.
 bool ValuesEqual(const base::Value* expected,
                  const base::Value* actual,
                  std::string* error) {
@@ skipping 438 matching lines @@
   }
   {
     ValueStoreChangeList changes;
     changes.push_back(ValueStoreChange(key3_, val3_->DeepCopy(), NULL));
     changes.push_back(
         ValueStoreChange("qwerty", val3_->DeepCopy(), NULL));
     EXPECT_PRED_FORMAT2(ChangesEq, changes, storage_->Clear());
     EXPECT_PRED_FORMAT2(ChangesEq, ValueStoreChangeList(), storage_->Clear());
   }
 }