[chromedriver] Support clicking an element in sub frames.

chrome/test/chromedriver/stub_web_view.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 "base/values.h"
 #include "chrome/test/chromedriver/status.h"
 #include "chrome/test/chromedriver/stub_web_view.h"
 #include "chrome/test/chromedriver/ui_events.h"
 
 StubWebView::StubWebView(const std::string& id) : id_(id) {}
@@ skipping 65 matching lines @@
   return Status(kOk);
 }
 
 JavaScriptDialogManager* StubWebView::GetJavaScriptDialogManager() {
   return NULL;
 }
 
 Status StubWebView::CaptureScreenshot(std::string* screenshot) {
   return Status(kOk);
 }
+
+Status StubWebView::GetFramePath(const std::string& frame_id,
+                                 std::list<Frame>* frames) {
+  return Status(kOk);
+}