Revert of Enforce capability spec renderer <--> browser

content/browser/mojo/merge_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 "content/browser/mojo/merge_dictionary.h"
-
-namespace content {
-
-void MergeDictionary(base::DictionaryValue* target,
-                     const base::DictionaryValue* source) {
-  for (base::DictionaryValue::Iterator it(*source); !it.IsAtEnd();
-       it.Advance()) {
-    const base::Value* merge_value = &it.value();
-    // Check whether we have to merge dictionaries.
-    if (merge_value->IsType(base::Value::TYPE_DICTIONARY)) {
-      base::DictionaryValue* sub_dict;
-      if (target->GetDictionaryWithoutPathExpansion(it.key(), &sub_dict)) {
-        MergeDictionary(
-            sub_dict,
-            static_cast<const base::DictionaryValue*>(merge_value));
-        continue;
-      }
-    }
-    if (merge_value->IsType(base::Value::TYPE_LIST)) {
-      const base::ListValue* merge_list = nullptr;
-      if (merge_value->GetAsList(&merge_list)) {
-        base::ListValue* target_list = nullptr;
-        DCHECK(target->GetListWithoutPathExpansion(it.key(), &target_list));
-        for (size_t i = 0; i < merge_list->GetSize(); ++i) {
-          std::string value;
-          DCHECK(merge_list->GetString(i, &value));
-          target_list->AppendString(value);
-        }
-      }
-    } else {
-      // All other cases: Make a copy and hook it up.
-      target->SetWithoutPathExpansion(it.key(), merge_value->DeepCopy());
-    }
-  }
-}
-
-}  // namespace content