text: // Copyright 2012, Google Inc.
  // All rights reserved.
  // 
  // Redistribution and use in source and binary forms, with or without
  // modification, are permitted provided that the following conditions are
  // met:
  //
  //     * Redistributions of source code must retain the above copyright
  // notice, this list of conditions and the following disclaimer.
  //     * Redistributions in binary form must reproduce the above
  // copyright notice, this list of conditions and the following disclaimer
  // in the documentation and/or other materials provided with the
  // distribution.
  //     * Neither the name of Google Inc. nor the names of its
  // contributors may be used to endorse or promote products derived from
  // this software without specific prior written permission.
  // 
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           
  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY           
  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #import <Foundation/Foundation.h>
  
  // This class is used to check if Google Chrome is installed in the system and
  // to open a URL in Google Chrome either with or without a callback URL.
  @interface OpenInChromeController : NSObject
  
  // Returns a shared instance of the OpenInChromeController.
  + (OpenInChromeController *)sharedInstance;
  
  // Returns YES if Google Chrome is installed in the user's system.
  - (BOOL)isChromeInstalled;
  
  // Opens a URL in Google Chrome.
  - (BOOL)openInChrome:(NSURL *)url;
  
  // Open a URL in Google Chrome providing a |callbackURL| to return to the app.
  // URLs from the same app will be opened in the same tab unless |createNewTab|
  // is set to YES.
  // |callbackURL| can be nil.
  // The return value of this method is YES if the URL is successfully opened.
  - (BOOL)openInChrome:(NSURL *)url
       withCallbackURL:(NSURL *)callbackURL
          createNewTab:(BOOL)createNewTab;
  
  @end
  