Use mojo for Chrome Loading, Part 1

content/browser/loader/resource_dispatcher_host_impl.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.
 
 // This is the browser side of the resource dispatcher, it receives requests
 // from the child process (i.e. [Renderer, Plugin, Worker]ProcessHost), and
 // dispatches them to URLRequests. It then forwards the messages from the
 // URLRequests back to the correct process for handling.
 //
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
@@ skipping 13 matching lines @@
 #include "base/observer_list.h"
 #include "base/time/time.h"
 #include "base/timer/timer.h"
 #include "content/browser/download/download_resource_handler.h"
 #include "content/browser/download/save_types.h"
 #include "content/browser/loader/global_routing_id.h"
 #include "content/browser/loader/resource_loader.h"
 #include "content/browser/loader/resource_loader_delegate.h"
 #include "content/browser/loader/resource_scheduler.h"
 #include "content/common/content_export.h"
+#include "content/common/url_loader.mojom.h"
 #include "content/public/browser/global_request_id.h"
 #include "content/public/browser/resource_dispatcher_host.h"
 #include "content/public/common/request_context_type.h"
 #include "content/public/common/resource_type.h"
 #include "ipc/ipc_message.h"
+#include "mojo/public/cpp/system/data_pipe.h"
 #include "net/base/request_priority.h"
 #include "net/cookies/canonical_cookie.h"
 #include "net/url_request/url_request.h"
 
 class ResourceHandler;
 
 namespace base {
 class FilePath;
 }
 
@@ skipping 18 matching lines @@
 class ResourceMessageFilter;
 class ResourceRequestInfoImpl;
 class SaveFileManager;
 class ServiceWorkerNavigationHandleCore;
 struct CommonNavigationParams;
 struct DownloadSaveInfo;
 struct NavigationRequestInfo;
 struct Referrer;
 struct ResourceRequest;
 
+namespace mojom {
+class URLLoader;
+}  // namespace mojom
+
 class CONTENT_EXPORT ResourceDispatcherHostImpl
     : public ResourceDispatcherHost,
       public ResourceLoaderDelegate {
  public:
   ResourceDispatcherHostImpl();
   ~ResourceDispatcherHostImpl() override;
 
   // Returns the current ResourceDispatcherHostImpl. May return NULL if it
   // hasn't been created yet.
   static ResourceDispatcherHostImpl* Get();
@@ skipping 188 matching lines @@
   // using its shared memory buffer. Frees up that file descriptor to be used
   // elsewhere.
   void FinishedWithResourcesForRequest(net::URLRequest* request);
 
   // PlzNavigate: Begins a request for NavigationURLLoader. |loader| is the
   // loader to attach to the leaf resource handler.
   void BeginNavigationRequest(ResourceContext* resource_context,
                               const NavigationRequestInfo& info,
                               NavigationURLLoaderImplCore* loader);
 
+  int num_in_flight_requests_for_testing() const {
+    return num_in_flight_requests_;
+  }
+
   // Turns on stale-while-revalidate support, regardless of command-line flags
   // or experiment status. For unit tests only.
   void EnableStaleWhileRevalidateForTesting();
 
   // Sets the LoaderDelegate, which must outlive this object. Ownership is not
   // transferred. The LoaderDelegate should be interacted with on the IO thread.
   void SetLoaderDelegate(LoaderDelegate* loader_delegate);
 
   void OnRenderFrameDeleted(const GlobalFrameRoutingId& global_routing_id);
 
+  // This function is used when loading with mojo.
+  // Called when loading a request with mojo.

[kinuko, 2016/08/03 18:20:07]

nit: these two lines of comment feel a bit verbose / saying very similar thing?

[yhirano, 2016/08/04 12:50:51]

Done.

+  void OnRequestResourceWithMojo(
+      int routing_id,
+      int request_id,
+      const ResourceRequest& request,
+      mojo::InterfaceRequest<mojom::URLLoader> mojo_request,
+      mojom::URLLoaderClientPtr url_loader_client,
+      ResourceMessageFilter* filter);
+
  private:
   friend class ResourceDispatcherHostTest;
 
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            TestBlockedRequestsProcessDies);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            CalculateApproximateMemoryCost);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
                            DetachableResourceTimesOut);
   FRIEND_TEST_ALL_PREFIXES(ResourceDispatcherHostTest,
@@ skipping 123 matching lines @@
   void UpdateLoadInfo();
 
   // Resumes or cancels (if |cancel_requests| is true) any blocked requests.
   void ProcessBlockedRequestsForRoute(
       const GlobalFrameRoutingId& global_routing_id,
       bool cancel_requests);
 
   void OnRequestResource(int routing_id,
                          int request_id,
                          const ResourceRequest& request_data);
+
+  void OnRequestResourceInternal(
+      int routing_id,
+      int request_id,
+      const ResourceRequest& request_data,
+      mojo::InterfaceRequest<mojom::URLLoader> mojo_request,
+      mojom::URLLoaderClientPtr url_loader_client);
+
   void OnSyncLoad(int request_id,
                   const ResourceRequest& request_data,
                   IPC::Message* sync_result);
 
   bool IsRequestIDInUse(const GlobalRequestID& id) const;
 
   // Update the ResourceRequestInfo and internal maps when a request is
   // transferred from one process to another.
   void UpdateRequestForTransfer(int child_id,
                                 int route_id,
                                 int request_id,
                                 const ResourceRequest& request_data,
                                 LoaderMap::iterator iter);
 
   void BeginRequest(int request_id,
                     const ResourceRequest& request_data,
                     IPC::Message* sync_result,  // only valid for sync
-                    int route_id);              // only valid for async
+                    int route_id,               // only valid for async
+                    mojo::InterfaceRequest<mojom::URLLoader> mojo_request,
+                    mojom::URLLoaderClientPtr url_loader_client);
 
   // Creates a ResourceHandler to be used by BeginRequest() for normal resource
   // loading.
   std::unique_ptr<ResourceHandler> CreateResourceHandler(
       net::URLRequest* request,
       const ResourceRequest& request_data,
       IPC::Message* sync_result,
       int route_id,
       int process_type,
       int child_id,
-      ResourceContext* resource_context);
+      ResourceContext* resource_context,
+      mojo::InterfaceRequest<mojom::URLLoader> mojo_request,
+      mojom::URLLoaderClientPtr url_loader_client);
 
   // Wraps |handler| in the standard resource handlers for normal resource
   // loading and navigation requests. This adds MimeTypeResourceHandler and
   // ResourceThrottles.
   std::unique_ptr<ResourceHandler> AddStandardHandlers(
       net::URLRequest* request,
       ResourceType resource_type,
       ResourceContext* resource_context,
       RequestContextType fetch_request_context_type,
       AppCacheService* appcache_service,
@@ skipping 153 matching lines @@
   // Allows tests to use a mock CertStore. If set, the CertStore must
   // outlive this ResourceDispatcherHostImpl.
   CertStore* cert_store_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_RESOURCE_DISPATCHER_HOST_IMPL_H_