Don't navigate in WebContentsDelegate::OpenURLFromTab.

content/shell/browser/shell.h

 // Copyright 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 CONTENT_SHELL_BROWSER_SHELL_H_
 #define CONTENT_SHELL_BROWSER_SHELL_H_
 
 #include <stdint.h>
 
 #include <vector>
 
@@ skipping 89 matching lines @@
 #if defined(OS_MACOSX)
   // Public to be called by an ObjC bridge object.
   void ActionPerformed(int control);
   void URLEntered(const std::string& url_string);
 #elif defined(OS_ANDROID)
   // Registers the Android Java to native methods.
   static bool Register(JNIEnv* env);
 #endif
 
   // WebContentsDelegate
+  WebContents* OpenURLFromTab(WebContents* source,
+                              const OpenURLParams& params) override;
   void AddNewContents(WebContents* source,
                       WebContents* new_contents,
                       WindowOpenDisposition disposition,
                       const gfx::Rect& initial_rect,
                       bool user_gesture,
                       bool* was_blocked) override;
   void LoadingStateChanged(WebContents* source,
                            bool to_different_document) override;
 #if defined(OS_ANDROID)
   void LoadProgressChanged(WebContents* source, double progress) override;
@@ skipping 133 matching lines @@
   static base::Callback<void(Shell*)> shell_created_callback_;
 
   // True if the destructur of Shell should post a quit closure on the current
   // message loop if the destructed Shell object was the last one.
   static bool quit_message_loop_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_SHELL_BROWSER_SHELL_H_