[chromedriver] Fix 3 bugs about web view, window handle and target window.

chrome/test/chromedriver/chrome/chrome.h

 // 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.
 
 #ifndef CHROME_TEST_CHROMEDRIVER_CHROME_CHROME_H_
 #define CHROME_TEST_CHROMEDRIVER_CHROME_CHROME_H_
 
 #include <list>
 #include <string>
 
 class Status;
 class WebView;
 
 class Chrome {
  public:
   virtual ~Chrome() {}
 
   virtual std::string GetVersion() = 0;
 
-  // Return a list of opened WebViews.
-  virtual Status GetWebViews(std::list<WebView*>* web_views) = 0;
+  // Return ids of opened WebViews in the same order as they are opened.
+  virtual Status GetWebViewIds(std::list<std::string>* web_view_ids) = 0;
+
+  // Return the WebView for the given id.
+  virtual Status GetWebViewById(const std::string& id, WebView** web_view) = 0;
 
   // Returns whether a JavaScript dialog is open.
   virtual Status IsJavaScriptDialogOpen(bool* is_open) = 0;
 
   // Returns the message of the open JavaScript dialog.
   virtual Status GetJavaScriptDialogMessage(std::string* message) = 0;
 
   // Handles an open JavaScript dialog.
   virtual Status HandleJavaScriptDialog(bool accept,
                                         const std::string& prompt_text) = 0;
 
   // Get the operation system where Chrome is running.
   virtual std::string GetOperatingSystemName() = 0;
 
   // Quits Chrome.
   virtual Status Quit() = 0;
 };
 
 #endif  // CHROME_TEST_CHROMEDRIVER_CHROME_CHROME_H_