[ChromeDriver] Select the main frame if a non-existant child frame is targeted.

chrome/test/chromedriver/stub_chrome.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/test/chromedriver/stub_chrome.h"
+#include "chrome/test/chromedriver/status.h"
+
+StubChrome::StubChrome() {}
+
+StubChrome::~StubChrome() {}
+
+Status StubChrome::Load(const std::string& url) {
+  return Status(kOk);
+}
+
+Status StubChrome::Reload() {
+  return Status(kOk);
+}
+
+Status StubChrome::EvaluateScript(const std::string& frame,
+                                  const std::string& function,
+                                  scoped_ptr<base::Value>* result) {
+  return Status(kOk);
+}
+
+Status StubChrome::CallFunction(const std::string& frame,
+                                const std::string& function,
+                                const base::ListValue& args,
+                                scoped_ptr<base::Value>* result) {
+  return Status(kOk);
+}
+
+Status StubChrome::GetFrameByFunction(const std::string& frame,
+                                      const std::string& function,
+                                      const base::ListValue& args,
+                                      std::string* out_frame) {
+  return Status(kOk);
+}
+
+Status StubChrome::DispatchMouseEvents(
+    const std::list<MouseEvent>& events) {
+  return Status(kOk);
+}
+
+Status StubChrome::DispatchKeyEvents(
+    const std::list<KeyEvent>& events) {
+  return Status(kOk);
+}
+
+Status StubChrome::Quit() {
+  return Status(kOk);
+}
+
+Status StubChrome::WaitForPendingNavigations(
+    const std::string& frame_id) {
+  return Status(kOk);
+}
+
+Status StubChrome::GetMainFrame(
+    std::string* frame_id) {
+  return Status(kOk);
+}