[chromedriver]Implement command: title.

chrome/test/chromedriver/commands.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 "chrome/test/chromedriver/commands.h"
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/format_macros.h"
@@ skipping 87 matching lines @@
   std::string script;
   if (!params.GetString("script", &script))
     return Status(kUnknownError, "'script' must be a string");
   const base::ListValue* args;
   if (!params.GetList("args", &args))
     return Status(kUnknownError, "'args' must be a list");
 
   return session->chrome->CallFunction(
       "function(){" + script + "}", *args, value);
 }
+
+Status ExecuteGetTitle(
+    Session* session,
+    const base::DictionaryValue& params,
+    scoped_ptr<base::Value>* value) {
+  const char* kGetTitleScript =
+      "function() {"
+      "  if (document.title)"
+      "    return document.title;"
+      "  else"
+      "    return document.URL;"
+      "}";
+  base::ListValue args;
+  return session->chrome->CallFunction(
+      kGetTitleScript, args, value);
+}