Navigation transitions: Plumb data from the outgoing renderer to the incoming renderer

content/browser/loader/cross_site_resource_handler.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_BROWSER_LOADER_CROSS_SITE_RESOURCE_HANDLER_H_
 #define CONTENT_BROWSER_LOADER_CROSS_SITE_RESOURCE_HANDLER_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "content/browser/loader/layered_resource_handler.h"
 #include "content/common/content_export.h"
 #include "net/url_request/url_request_status.h"
 
 namespace net {
 class URLRequest;
 }
 
 namespace content {
 
+struct TransitionLayerData;
+
 // Ensures that cross-site responses are delayed until the onunload handler of
 // the previous page is allowed to run.  This handler wraps an
 // AsyncEventHandler, and it sits inside SafeBrowsing and Buffered event
 // handlers.  This is important, so that it can intercept OnResponseStarted
 // after we determine that a response is safe and not a download.
 class CrossSiteResourceHandler : public LayeredResourceHandler {
  public:
   CrossSiteResourceHandler(scoped_ptr<ResourceHandler> next_handler,
                            net::URLRequest* request);
   virtual ~CrossSiteResourceHandler();
@@ skipping 32 matching lines @@
   // telling the old RenderViewHost to run its onunload handler.
   void StartCrossSiteTransition(ResourceResponse* response,
                                 bool should_transfer);
 
   // Defer the navigation to the UI thread to check whether transfer is required
   // or not. Currently only used in --site-per-process.
   bool DeferForNavigationPolicyCheck(ResourceRequestInfoImpl* info,
                                      ResourceResponse* response,
                                      bool* defer);
 
-  bool OnNavigationTransitionResponseStarted(ResourceResponse* response,
-                                             bool* defer);
+  bool OnNavigationTransitionResponseStarted(
+      ResourceResponse* response,
+      bool* defer,
+      const TransitionLayerData& transition_data);
 
   bool OnNormalResponseStarted(ResourceResponse* response,
                                bool* defer);
 
   void ResumeOrTransfer(bool is_transfer);
   void ResumeIfDeferred();
 
   // Called when about to defer a request.  Sets |did_defer_| and logs the
   // defferral
   void OnDidDefer();
@@ skipping 11 matching lines @@
   // PostTaskAndReplyWithResult. If a transfer is needed, it goes back to the UI
   // thread. This can be removed once the code is changed to only do one hop.
   base::WeakPtrFactory<CrossSiteResourceHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CrossSiteResourceHandler);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_CROSS_SITE_RESOURCE_HANDLER_H_