[chromedriver] Implement reconnection to DevTools.

chrome/test/chromedriver/web_view.h

 // 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.
 
 #ifndef CHROME_TEST_CHROMEDRIVER_WEB_VIEW_H_
 #define CHROME_TEST_CHROMEDRIVER_WEB_VIEW_H_
 
 #include <list>
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 
 namespace base {
 class ListValue;
 class Value;
 }
 
 class JavaScriptDialogManager;
 struct KeyEvent;
 struct MouseEvent;
 class Status;
 
 class WebView {
  public:
   virtual ~WebView() {}
 
   // Return the id for this WebView.
   virtual std::string GetId() = 0;
 
+  // Make DevToolsCient connect to DevTools if it is disconnected.
+  virtual Status ConnectIfNecessary() = 0;
+
   // Close the WebView itself.
   virtual Status Close() = 0;
 
   // Load a given URL in the main frame.
   virtual Status Load(const std::string& url) = 0;
 
   // Reload the current page.
   virtual Status Reload() = 0;
 
   // Evaluates a JavaScript expression in a specified frame and returns
@@ skipping 36 matching lines @@
   virtual Status GetMainFrame(std::string* out_frame) = 0;
 
   // Returns the JavaScriptDialogManager. Never null.
   virtual JavaScriptDialogManager* GetJavaScriptDialogManager() = 0;
 
   // Captures the visible portions of the web view as a base64-encoded PNG.
   virtual Status CaptureScreenshot(std::string* screenshot) = 0;
 };
 
 #endif  // CHROME_TEST_CHROMEDRIVER_WEB_VIEW_H_