[ios] Adds support for Find in Page to the new architecture.

ios/clean/chrome/browser/model/browser.h

 // Copyright 2017 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 IOS_CLEAN_CHROME_BROWSER_MODEL_BROWSER_H_
 #define IOS_CLEAN_CHROME_BROWSER_MODEL_BROWSER_H_
 
 #include "base/macros.h"
 #include "ios/shared/chrome/browser/tabs/web_state_list.h"
 
+@class CommandDispatcher;
+
 namespace ios {
 class ChromeBrowserState;
 }
 
 // Browser holds the state backing a collection of Tabs and the attached
 // UI elements (Tab strip, ...).
 class Browser {
  public:
   explicit Browser(ios::ChromeBrowserState* browser_state);
   ~Browser();
 
   WebStateList& web_state_list() { return web_state_list_; }
   const WebStateList& web_state_list() const { return web_state_list_; }
 
+  CommandDispatcher* dispatcher() { return dispatcher_; }

[rohitrao (ping after 24h), 2017/03/14 01:10:36]

2) Added the dispatcher to Browser, as discussed.

+
   ios::ChromeBrowserState* browser_state() const { return browser_state_; }
 
  private:
   WebStateList web_state_list_;
+  __strong CommandDispatcher* dispatcher_;
   ios::ChromeBrowserState* browser_state_;
 
   DISALLOW_COPY_AND_ASSIGN(Browser);
 };
 
 #endif  // IOS_CLEAN_CHROME_BROWSER_MODEL_BROWSER_H_