Use unique_ptr<DictionaryValue> in ProxyConfigDictionary

chrome/browser/extensions/api/proxy/proxy_apitest.cc

 // Copyright (c) 2012 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 "build/build_config.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/common/chrome_switches.h"
@@ skipping 19 matching lines @@
                         const std::string& expected_server,
                         const std::string& bypass,
                         const std::string& expected_pac_url,
                         PrefService* pref_service) {
     const PrefService::Preference* pref =
         pref_service->FindPreference(proxy_config::prefs::kProxy);
     ASSERT_TRUE(pref != NULL);
     EXPECT_TRUE(pref->IsExtensionControlled());
 
     ProxyConfigDictionary dict(
-        pref_service->GetDictionary(proxy_config::prefs::kProxy));
+        pref_service->GetDictionary(proxy_config::prefs::kProxy)
+            ->CreateDeepCopy());
 
     ProxyPrefs::ProxyMode mode;
     ASSERT_TRUE(dict.GetMode(&mode));
     EXPECT_EQ(expected_mode, mode);
 
     std::string value;
     if (!bypass.empty()) {
        ASSERT_TRUE(dict.GetBypassList(&value));
        EXPECT_EQ(bypass, value);
      } else {
@@ skipping 274 matching lines @@
       RunExtensionSubtest("proxy/events", "invalid_proxy.html")) << message_;
 }
 
 // Tests error events: PAC script parse error.
 IN_PROC_BROWSER_TEST_F(ProxySettingsApiTest, ProxyEventsParseError) {
   ASSERT_TRUE(
       RunExtensionSubtest("proxy/events", "parse_error.html")) << message_;
 }
 
 }  // namespace extensions