Fix auto raw pointer deduction on linux

extensions/renderer/native_extension_bindings_system_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 "extensions/renderer/native_extension_bindings_system.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
 #include "components/crx_file/id_util.h"
@@ skipping 81 matching lines @@
     script_context_set_ = base::MakeUnique<ScriptContextSet>(&extension_ids_);
     bindings_system_ = base::MakeUnique<NativeExtensionBindingsSystem>(
         base::Bind(&NativeExtensionBindingsSystemUnittest::MockSendRequestIPC,
                    base::Unretained(this)),
         base::Bind(&NativeExtensionBindingsSystemUnittest::MockSendListenerIPC,
                    base::Unretained(this)));
     APIBindingTest::SetUp();
   }
 
   void TearDown() override {
-    for (const auto& context : raw_script_contexts_)
+    for (auto* context : raw_script_contexts_)
       script_context_set_->Remove(context);
     base::RunLoop().RunUntilIdle();
     script_context_set_.reset();
     bindings_system_.reset();
     APIBindingTest::TearDown();
   }
 
   void MockSendRequestIPC(ScriptContext* context,
                           const ExtensionHostMsg_Request_Params& params) {
     last_params_.name = params.name;
@@ skipping 534 matching lines @@
   // Respond and validate.
   bindings_system()->HandleResponse(last_params().request_id, true,
                                     base::ListValue(), "Some API Error");
 
   EXPECT_EQ("\"Some API Error\"",
             GetStringPropertyFromObject(context->Global(), context,
                                         "lastErrorMessage"));
 }
 
 }  // namespace extensions