s/IsSamePage/IsSameDocument for NavigationContext.

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_
 
 class GURL;
 
 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;
 
-  // Whether the navigation happened in the same page. Examples of same page
-  // navigations are:
+  // Whether the navigation happened within the same document. Examples of same
+  // document navigations are:
   // * reference fragment navigations
   // * pushState/replaceState
-  // * same page history navigation
-  virtual bool IsSamePage() const = 0;
+  // * same document history navigation
+  virtual bool IsSameDocument() const = 0;
 
   // Whether the navigation resulted in an error page.
   virtual bool IsErrorPage() const = 0;
 
   virtual ~NavigationContext() {}
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_WEB_STATE_NAVIGATION_CONTEXT_H_