network service: pass PlzNavigate resulting data via mojo data pipe

content/browser/frame_host/navigation_request.h

 // Copyright 2014 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_FRAME_HOST_NAVIGATION_REQUEST_H_
 #define CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_
 
 #include <memory>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/loader/navigation_url_loader_delegate.h"
 #include "content/common/content_export.h"
 #include "content/common/frame_message_enums.h"
 #include "content/common/navigation_params.h"
 #include "content/public/browser/navigation_throttle.h"
 #include "content/public/common/previews_state.h"
+#include "mojo/public/cpp/system/data_pipe.h"
 
 namespace content {
 
 class FrameNavigationEntry;
 class FrameTreeNode;
 class NavigationControllerImpl;
 class NavigationHandleImpl;
 class NavigationURLLoader;
 class NavigationData;
 class ResourceRequestBody;
@@ skipping 145 matching lines @@
                     bool may_transfer,
                     const FrameNavigationEntry* frame_navigation_entry,
                     const NavigationEntryImpl* navitation_entry);
 
   // NavigationURLLoaderDelegate implementation.
   void OnRequestRedirected(
       const net::RedirectInfo& redirect_info,
       const scoped_refptr<ResourceResponse>& response) override;
   void OnResponseStarted(const scoped_refptr<ResourceResponse>& response,
                          std::unique_ptr<StreamHandle> body,
+                         mojo::ScopedDataPipeConsumerHandle consumer_handle,
                          const SSLStatus& ssl_status,
                          std::unique_ptr<NavigationData> navigation_data,
                          const GlobalRequestID& request_id,
                          bool is_download,
                          bool is_stream) override;
   void OnRequestFailed(bool has_stale_copy_in_cache, int net_error) override;
   void OnRequestStarted(base::TimeTicks timestamp) override;
 
   // Called when the NavigationThrottles have been checked by the
   // NavigationHandle.
@@ skipping 46 matching lines @@
   // True for browser-initiated navigations and renderer-inititated navigations
   // started via the OpenURL path.
   // Note: the RenderFrameHostManager may still decide to have the navigation
   // commit in a different renderer process if it detects that a renderer
   // transfer is needed. This is the case in particular when --site-per-process
   // is enabled.
   bool may_transfer_;
 
   std::unique_ptr<NavigationHandleImpl> navigation_handle_;
 
-  // Holds the ResourceResponse and the StreamHandle for the navigation while
-  // the WillProcessResponse checks are performed by the NavigationHandle.
+  // Holds the ResourceResponse and the StreamHandle (or
+  // DataPipeConsumerHandle) for the navigation while the WillProcessResponse
+  // checks are performed by the NavigationHandle.
   scoped_refptr<ResourceResponse> response_;
   std::unique_ptr<StreamHandle> body_;
+  mojo::ScopedDataPipeConsumerHandle handle_;
 
   base::Closure on_start_checks_complete_closure_;
 
   DISALLOW_COPY_AND_ASSIGN(NavigationRequest);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_NAVIGATION_REQUEST_H_