PlzNavigate: support the WebRequest API

content/public/browser/resource_request_info.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_RESOURCE_REQUEST_INFO_H_
 #define CONTENT_PUBLIC_BROWSER_RESOURCE_REQUEST_INFO_H_
 
 #include "base/callback_forward.h"
 #include "content/common/content_export.h"
 #include "content/public/common/resource_type.h"
 #include "third_party/WebKit/public/platform/WebPageVisibilityState.h"
 #include "third_party/WebKit/public/platform/WebReferrerPolicy.h"
 #include "ui/base/page_transition_types.h"
 
 namespace net {
 class URLRequest;
 }
 
 namespace content {
+class NavigationUIData;
 class ResourceContext;
 class WebContents;
 
 // Each URLRequest allocated by the ResourceDispatcherHost has a
 // ResourceRequestInfo instance associated with it.
 class ResourceRequestInfo {
  public:
   // Returns the ResourceRequestInfo associated with the given URLRequest.
   CONTENT_EXPORT static const ResourceRequestInfo* ForRequest(
       const net::URLRequest* request);
@@ skipping 115 matching lines @@
 
   // Returns true if this is associated with an asynchronous request.
   virtual bool IsAsync() const = 0;
 
   // Whether this is a download.
   virtual bool IsDownload() const = 0;
 
   // Whether this request if using Lo-Fi mode.
   virtual bool IsUsingLoFi() const = 0;
 
+  // PlzNavigate
+  // Only used for main resources. Returns opaque data set by the embedder on

[nasko, 2016/09/22 18:32:50]

What is "main resource"? What about subframe navigations, aren't those covered?

[clamy, 2016/09/26 15:37:51]

I meant the load of the main resource of each frame (including subframe).
Switched to using navigation which is less confusing.

+  // the UI thread at the beginning of navigation.
+  virtual NavigationUIData* GetNavigationUIData() const = 0;
+
  protected:
   virtual ~ResourceRequestInfo() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RESOURCE_REQUEST_INFO_H_