Move //components/test_runner back into //content/shell

components/test_runner/tracked_dictionary.cc

-// Copyright 2016 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 "components/test_runner/tracked_dictionary.h"
-
-#include <utility>
-
-#include "base/memory/ptr_util.h"
-
-namespace test_runner {
-
-TrackedDictionary::TrackedDictionary() {}
-
-void TrackedDictionary::ResetChangeTracking() {
-  changed_values_.Clear();
-}
-
-void TrackedDictionary::ApplyUntrackedChanges(
-    const base::DictionaryValue& new_changes) {
-  current_values_.MergeDictionary(&new_changes);
-
-  for (base::DictionaryValue::Iterator it(new_changes); !it.IsAtEnd();
-       it.Advance()) {
-    changed_values_.Remove(it.key(), nullptr);
-  }
-}
-
-void TrackedDictionary::Set(const std::string& path,
-                            std::unique_ptr<base::Value> new_value) {
-  // Is this truly a *new* value?
-  const base::Value* old_value;
-  if (current_values_.Get(path, &old_value)) {
-    if (base::Value::Equals(old_value, new_value.get()))
-      return;
-  }
-
-  changed_values_.Set(path, new_value->CreateDeepCopy());
-  current_values_.Set(path, std::move(new_value));
-}
-
-void TrackedDictionary::SetBoolean(const std::string& path, bool new_value) {
-  Set(path, base::MakeUnique<base::FundamentalValue>(new_value));
-}
-
-void TrackedDictionary::SetString(const std::string& path,
-                                  const std::string& new_value) {
-  Set(path, base::MakeUnique<base::StringValue>(new_value));
-}
-
-}  // namespace test_runner