Revert the merge of CrossSiteResourceHandler and NavigationResourceThrottle.

content/public/browser/web_contents_observer.h

 // Copyright (c) 2012 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_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 #define CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
@@ skipping 138 matching lines @@
   // NavigationHandle.
   //
   // Note that there is no guarantee that DidFinishNavigation will be called
   // for any particular navigation before DidStartNavigation is called on the
   // next.
   virtual void DidStartNavigation(NavigationHandle* navigation_handle) {}
 
   // Called when a navigation encountered a server redirect.
   virtual void DidRedirectNavigation(NavigationHandle* navigation_handle) {}
 
+  // PlzNavigate
   // Called when the navigation is ready to be committed in a renderer. Most
   // observers should use DidFinishNavigation instead, which happens right
   // after the navigation commits. This method is for observers that want to
   // initialize renderer-side state just before the RenderFrame commits the
   // navigation.
   //
-  // PlzNavigate
   // This is the first point in time where a RenderFrameHost is associated with
   // the navigation.
   virtual void ReadyToCommitNavigation(NavigationHandle* navigation_handle) {}
 
   // Called when a navigation finished in the WebContents. This happens when a
   // navigation is committed, aborted or replaced by a new one. To know if the
   // navigation has committed, use NavigationHandle::HasCommitted; use
   // NavigationHandle::IsErrorPage to know if the navigation resulted in an
   // error page.
   //
@@ skipping 338 matching lines @@
   void ResetWebContents();
 
   WebContentsImpl* web_contents_;
 
   DISALLOW_COPY_AND_ASSIGN(WebContentsObserver);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_WEB_CONTENTS_OBSERVER_H_