[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 130 matching lines @@
   base::ListValue args;
   args.Append(new base::StringValue(xpath));
   std::string frame;
   Status status = session->chrome->GetFrameByFunction(
       session->frame, evaluate_xpath_script, args, &frame);
   if (status.IsError())
     return status;
   session->frame = frame;
   return Status(kOk);
 }
+
+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(
+      session->frame, kGetTitleScript, args, value);
+}