Don't serialize extension user script injection results unless the extension

chrome/browser/extensions/api/execute_code_function.cc

 // Copyright (c) 2013 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 "chrome/browser/extensions/api/execute_code_function.h"
 
 #include "chrome/browser/extensions/api/tabs/tabs_constants.h"
 #include "chrome/browser/extensions/image_loader.h"
 #include "chrome/browser/extensions/script_executor.h"
 #include "chrome/common/extensions/api/i18n/default_locale_handler.h"
@@ skipping 109 matching lines @@
   }
   CHECK_NE(UserScript::UNDEFINED, run_at);
 
   executor->ExecuteScript(
       extension->id(),
       script_type,
       code_string,
       frame_scope,
       run_at,
       ScriptExecutor::ISOLATED_WORLD,
-      IsWebView(),
+      IsWebView() ? ScriptExecutor::WEB_VIEW_PROCESS
+                  : ScriptExecutor::DEFAULT_PROCESS,
+      has_callback() ? ScriptExecutor::JSON_SERIALIZED_RESULT
+                     : ScriptExecutor::NO_RESULT,
       base::Bind(&ExecuteCodeFunction::OnExecuteCodeFinished, this));
   return true;
 }
 
 bool ExecuteCodeFunction::HasPermission() {
   return true;
 }
 
 bool ExecuteCodeFunction::RunImpl() {
   EXTENSION_FUNCTION_VALIDATE(Init());
@@ skipping 42 matching lines @@
     int32 on_page_id,
     const GURL& on_url,
     const base::ListValue& result) {
   if (!error.empty())
     SetError(error);
 
   SendResponse(error.empty());
 }
 
 }  // namespace extensions