Convert //chrome/browser/ui from scoped_ptr to std::unique_ptr

chrome/browser/ui/webui/policy_ui_browsertest.cc

Index: chrome/browser/ui/webui/policy_ui_browsertest.cc
diff --git a/chrome/browser/ui/webui/policy_ui_browsertest.cc b/chrome/browser/ui/webui/policy_ui_browsertest.cc
index effcdc6555827862b656aec7ab5e99a620e7179f..574900329deaefc418689bca7210c06449febf19 100644
--- a/chrome/browser/ui/webui/policy_ui_browsertest.cc
+++ b/chrome/browser/ui/webui/policy_ui_browsertest.cc
@@ -159,7 +159,7 @@ void PolicyUITest::VerifyPolicies(
   std::string json;
   ASSERT_TRUE(content::ExecuteScriptAndExtractString(contents, javascript,
                                                      &json));
-  scoped_ptr<base::Value> value_ptr = base::JSONReader::Read(json);
+  std::unique_ptr<base::Value> value_ptr = base::JSONReader::Read(json);
   const base::ListValue* actual_policies = NULL;
   ASSERT_TRUE(value_ptr.get());
   ASSERT_TRUE(value_ptr->GetAsList(&actual_policies));