Revert the merge of CrossSiteResourceHandler and NavigationResourceThrottle.

content/browser/loader/resource_dispatcher_host_impl.cc

 // 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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 
 #include <stddef.h>
 
@@ skipping 26 matching lines @@
 #include "content/browser/appcache/chrome_appcache_service.h"
 #include "content/browser/bad_message.h"
 #include "content/browser/blob_storage/chrome_blob_storage_context.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/frame_host/frame_tree.h"
 #include "content/browser/frame_host/navigation_handle_impl.h"
 #include "content/browser/frame_host/navigation_request_info.h"
 #include "content/browser/frame_host/navigator.h"
 #include "content/browser/loader/async_resource_handler.h"
 #include "content/browser/loader/async_revalidation_manager.h"
+#include "content/browser/loader/cross_site_resource_handler.h"
 #include "content/browser/loader/detachable_resource_handler.h"
 #include "content/browser/loader/intercepting_resource_handler.h"
 #include "content/browser/loader/loader_delegate.h"
 #include "content/browser/loader/mime_sniffing_resource_handler.h"
 #include "content/browser/loader/mojo_async_resource_handler.h"
 #include "content/browser/loader/navigation_resource_handler.h"
 #include "content/browser/loader/navigation_resource_throttle.h"
 #include "content/browser/loader/navigation_url_loader_impl_core.h"
 #include "content/browser/loader/power_save_block_resource_throttle.h"
 #include "content/browser/loader/redirect_to_file_resource_handler.h"
@@ skipping 1108 matching lines @@
       ServiceWorkerRequestHandler::GetHandler(loader_ptr->request());
   if (handler) {
     if (!handler->SanityCheckIsSameContext(filter_->service_worker_context())) {
       bad_message::ReceivedBadMessage(
           filter_, bad_message::RDHI_WRONG_STORAGE_PARTITION);
     } else {
       handler->CompleteCrossSiteTransfer(
           child_id, request_data.service_worker_provider_id);
     }
   }
+
+  // We should have a CrossSiteResourceHandler to finish the transfer.
+  DCHECK(info->cross_site_handler());
 }
 
 void ResourceDispatcherHostImpl::BeginRequest(
     int request_id,
     const ResourceRequest& request_data,
     IPC::Message* sync_result,  // only valid for sync
     int route_id,
     mojo::InterfaceRequest<mojom::URLLoader> mojo_request,
     mojom::URLLoaderClientPtr url_loader_client) {
   int process_type = filter_->process_type();
@@ skipping 385 matching lines @@
     std::unique_ptr<DetachableResourceHandler> detachable_handler =
         base::MakeUnique<DetachableResourceHandler>(
             request,
             base::TimeDelta::FromMilliseconds(kDefaultDetachableCancelDelayMs),
             std::move(handler));
     if (start_detached)
       detachable_handler->Detach();
     handler = std::move(detachable_handler);
   }
 
+  // PlzNavigate: If using --enable-browser-side-navigation, the
+  // CrossSiteResourceHandler is not needed. This codepath is not used for the
+  // actual navigation request, but only the subsequent blob URL load. This does
+  // not require request transfers.
+  if (!IsBrowserSideNavigationEnabled()) {
+    // Install a CrossSiteResourceHandler for all main frame requests. This will
+    // check whether a transfer is required and, if so, pause for the UI thread
+    // to drive the transfer.
+    bool is_swappable_navigation =
+        request_data.resource_type == RESOURCE_TYPE_MAIN_FRAME;
+    // If out-of-process iframes are possible, then all subframe requests need
+    // to go through the CrossSiteResourceHandler to enforce the site isolation
+    // policy.
+    if (!is_swappable_navigation &&
+        SiteIsolationPolicy::AreCrossProcessFramesPossible()) {
+      is_swappable_navigation =
+          request_data.resource_type == RESOURCE_TYPE_SUB_FRAME;
+    }
+    if (is_swappable_navigation && process_type == PROCESS_TYPE_RENDERER)
+      handler.reset(new CrossSiteResourceHandler(std::move(handler), request));
+  }
+
   return AddStandardHandlers(
       request, request_data.resource_type, resource_context,
       request_data.fetch_request_context_type, filter_->appcache_service(),
       child_id, route_id, std::move(handler));
 }
 
 std::unique_ptr<ResourceHandler>
 ResourceDispatcherHostImpl::AddStandardHandlers(
     net::URLRequest* request,
     ResourceType resource_type,
@@ skipping 225 matching lines @@
 }
 
 void ResourceDispatcherHostImpl::OnRenderViewHostSetIsLoading(int child_id,
                                                               int route_id,
                                                               bool is_loading) {
   scheduler_->OnLoadingStateChanged(child_id, route_id, !is_loading);
 }
 
 void ResourceDispatcherHostImpl::MarkAsTransferredNavigation(
     const GlobalRequestID& id,
-    const base::Closure& on_transfer_complete_callback) {
-  GetLoader(id)->MarkAsTransferring(on_transfer_complete_callback);
+    const scoped_refptr<ResourceResponse>& response) {
+  GetLoader(id)->MarkAsTransferring(response);
 }
 
 void ResourceDispatcherHostImpl::CancelTransferringNavigation(
     const GlobalRequestID& id) {
   // Request should still exist and be in the middle of a transfer.
   DCHECK(IsTransferredNavigation(id));
   RemovePendingRequest(id.child_id, id.request_id);
 }
 
 void ResourceDispatcherHostImpl::ResumeDeferredNavigation(
@@ skipping 866 matching lines @@
                                  &throttles);
     if (!throttles.empty()) {
       handler.reset(new ThrottlingResourceHandler(std::move(handler), request,
                                                   std::move(throttles)));
     }
   }
   return handler;
 }
 
 }  // namespace content