Added web::NavigationContext::GetPageTransition.

ios/web/public/web_state/navigation_context.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_WEB_PUBLIC_WEB_STATE_NAVIGATION_CONTEXT_H_
 #define IOS_WEB_PUBLIC_WEB_STATE_NAVIGATION_CONTEXT_H_
 
 #import <Foundation/Foundation.h>
 
+#include "ui/base/page_transition_types.h"
+
 class GURL;
 
 namespace net {
 class HttpResponseHeaders;
 }
 
 namespace web {
 
 class WebState;
 
 // Tracks information related to a single navigation. A NavigationContext is
 // provided to WebStateObserver methods to allow observers to track specific
 // navigations and their details. Observers should clear any references to a
 // NavigationContext at the time of WebStateObserver::DidFinishNavigation, just
 // before the handle is destroyed.
 class NavigationContext {
  public:
   // The WebState the navigation is taking place in.
   virtual WebState* GetWebState() = 0;
 
   // The URL the WebState is navigating to.
   virtual const GURL& GetUrl() const = 0;
 
+  // Returns the page transition type for this navigation.
+  virtual ui::PageTransition GetPageTransition() const = 0;
+
   // Whether the navigation happened within the same document. Examples of same
   // document navigations are:
   // * reference fragment navigations
   // * pushState/replaceState
   // * same document history navigation
   virtual bool IsSameDocument() const = 0;
 
   // Returns error if the navigation has failed.
   virtual NSError* GetError() const = 0;
 
   // Returns the response headers for the request, or null if there aren't any
   // response headers or they have not been received yet. The response headers
   // returned should not be modified, as modifications will not be reflected.
   virtual net::HttpResponseHeaders* GetResponseHeaders() const = 0;
 
   virtual ~NavigationContext() {}
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_WEB_STATE_NAVIGATION_CONTEXT_H_