Fix auto raw pointer deduction on linux

components/ntp_snippets/remote/remote_suggestion_unittest.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/ntp_snippets/remote/remote_suggestion.h"
 
 #include <utility>
 
 #include "base/json/json_reader.h"
 #include "base/strings/stringprintf.h"
@@ skipping 376 matching lines @@
   proto.add_ids("foo");
   proto.add_ids("bar");
   proto.set_title("a suggestion title");
   proto.set_snippet("the snippet describing the suggestion.");
   proto.set_salient_image_url("http://google.com/logo/");
   proto.set_publish_date(1476095492);
   proto.set_expiry_date(1476354691);
   proto.set_score(0.1f);
   proto.set_dismissed(false);
   proto.set_remote_category_id(1);
-  auto source = proto.add_sources();
+  auto* source = proto.add_sources();
   source->set_url("http://cool-suggestions.com/");
   source->set_publisher_name("Great Suggestions Inc.");
   source->set_amp_url("http://cdn.ampproject.org/c/foo/");
 
   std::unique_ptr<RemoteSuggestion> snippet =
       RemoteSuggestion::CreateFromProto(proto);
   ASSERT_THAT(snippet, NotNull());
   // The snippet database relies on the fact that the first id in the protocol
   // buffer is considered the unique id.
   EXPECT_EQ(snippet->id(), "foo");
@@ skipping 118 matching lines @@
   EXPECT_THAT(sugg.score(), Eq(9001));
   EXPECT_THAT(sugg.download_suggestion_extra(), IsNull());
   EXPECT_THAT(sugg.recent_tab_suggestion_extra(), IsNull());
   ASSERT_THAT(sugg.notification_extra(), NotNull());
   EXPECT_THAT(sugg.notification_extra()->deadline.ToJavaTime(),
               Eq(1467291697000));
 }
 
 }  // namespace
 }  // namespace ntp_snippets