Revert of Remove webkit's ResourceLoaderBridge interface.

content/child/resource_dispatcher.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.
 
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
 
 #ifndef CONTENT_CHILD_RESOURCE_DISPATCHER_H_
 #define CONTENT_CHILD_RESOURCE_DISPATCHER_H_
 
 #include <deque>
 #include <string>
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/linked_ptr.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/shared_memory.h"
 #include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
 #include "content/common/content_export.h"
 #include "ipc/ipc_listener.h"
 #include "ipc/ipc_sender.h"
 #include "net/base/request_priority.h"
 #include "webkit/common/resource_type.h"
 
-struct ResourceHostMsg_Request;
 struct ResourceMsg_RequestCompleteData;
 
 namespace webkit_glue {
 class ResourceLoaderBridge;
 struct ResourceResponseInfo;
 }
 
 namespace content {
 class RequestPeer;
 class ResourceDispatcherDelegate;
-class ResourceRequestBody;
 struct RequestInfo;
 struct ResourceResponseHead;
 struct SiteIsolationResponseMetaData;
-struct SyncLoadResponse;
 
 // This class serves as a communication interface between the
 // ResourceDispatcherHost in the browser process and the ResourceLoaderBridge in
 // the child process.  It can be used from any child process.
 class CONTENT_EXPORT ResourceDispatcher : public IPC::Listener {
  public:
   explicit ResourceDispatcher(IPC::Sender* sender);
   virtual ~ResourceDispatcher();
 
   // IPC::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
 
+  // Creates a ResourceLoaderBridge for this type of dispatcher, this is so
+  // this can be tested regardless of the ResourceLoaderBridge::Create
+  // implementation.
+  webkit_glue::ResourceLoaderBridge* CreateBridge(
+      const RequestInfo& request_info);
 
-  // Call this method to load the resource synchronously (i.e., in one shot).
-  // This is an alternative to the StartAsync method. Be warned that this method
-  // will block the calling thread until the resource is fully downloaded or an
-  // error occurs. It could block the calling thread for a long time, so only
-  // use this if you really need it!  There is also no way for the caller to
-  // interrupt this method. Errors are reported via the status field of the
-  // response parameter.
-  void StartSync(const RequestInfo& request_info,
-                 ResourceRequestBody* request_body,
-                 SyncLoadResponse* response);
+  // Adds a request from the pending_requests_ list, returning the new
+  // requests' ID
+  int AddPendingRequest(RequestPeer* callback,
+                        ResourceType::Type resource_type,
+                        int origin_pid,
+                        const GURL& frame_origin,
+                        const GURL& request_url);
 
-  // Call this method to initiate the request. If this method succeeds, then
-  // the peer's methods will be called asynchronously to report various events.
-  // Returns the request id.
-  int StartAsync(const RequestInfo& request_info,
-                 ResourceRequestBody* request_body,
-                 RequestPeer* peer);
-
-  // Removes a request from the |pending_requests_| list, returning true if the
+  // Removes a request from the pending_requests_ list, returning true if the
   // request was found and removed.
   bool RemovePendingRequest(int request_id);
 
-  // Cancels a request in the |pending_requests_| list.
-  void Cancel(int request_id);
+  // Cancels a request in the pending_requests_ list.
+  void CancelPendingRequest(int request_id);
+
+  IPC::Sender* message_sender() const {
+    return message_sender_;
+  }
 
   // Toggles the is_deferred attribute for the specified request.
   void SetDefersLoading(int request_id, bool value);
 
   // Indicates the priority of the specified request changed.
-  void DidChangePriority(int request_id,
+  void DidChangePriority(int routing_id, int request_id,
                          net::RequestPriority new_priority,
                          int intra_priority_value);
 
   // This does not take ownership of the delegate. It is expected that the
   // delegate have a longer lifetime than the ResourceDispatcher.
   void set_delegate(ResourceDispatcherDelegate* delegate) {
     delegate_ = delegate;
   }
 
   // Remembers IO thread timestamp for next resource message.
   void set_io_timestamp(base::TimeTicks io_timestamp) {
     io_timestamp_ = io_timestamp;
   }
 
  private:
   friend class ResourceDispatcherTest;
 
   typedef std::deque<IPC::Message*> MessageQueue;
   struct PendingRequestInfo {
     PendingRequestInfo();
 
     PendingRequestInfo(RequestPeer* peer,
                        ResourceType::Type resource_type,
                        int origin_pid,
                        const GURL& frame_origin,
-                       const GURL& request_url,
-                       bool download_to_file);
+                       const GURL& request_url);
 
     ~PendingRequestInfo();
 
     RequestPeer* peer;
     ResourceType::Type resource_type;
     // The PID of the original process which issued this request. This gets
     // non-zero only for a request proxied by another renderer, particularly
     // requests from plugins.
     int origin_pid;
     MessageQueue deferred_message_queue;
     bool is_deferred;
     // Original requested url.
     GURL url;
     // The security origin of the frame that initiates this request.
     GURL frame_origin;
     // The url of the latest response even in case of redirection.
     GURL response_url;
-    bool download_to_file;
     linked_ptr<IPC::Message> pending_redirect_message;
     base::TimeTicks request_start;
     base::TimeTicks response_start;
     base::TimeTicks completion_time;
     linked_ptr<base::SharedMemory> buffer;
     linked_ptr<SiteIsolationResponseMetaData> site_isolation_metadata;
     bool blocked_response;
     int buffer_size;
   };
   typedef base::hash_map<int, PendingRequestInfo> PendingRequestList;
 
   // Helper to lookup the info based on the request_id.
   // May return NULL if the request as been canceled from the client side.
   PendingRequestInfo* GetPendingRequestInfo(int request_id);
 
   // Follows redirect, if any, for the given request.
   void FollowPendingRedirect(int request_id, PendingRequestInfo& request_info);
 
   // Message response handlers, called by the message handler for this process.
-  void OnUploadProgress(int request_id, int64 position, int64 size);
+  void OnUploadProgress(
+      int request_id,
+      int64 position,
+      int64 size);
   void OnReceivedResponse(int request_id, const ResourceResponseHead&);
   void OnReceivedCachedMetadata(int request_id, const std::vector<char>& data);
-  void OnReceivedRedirect(int request_id,
-                          const GURL& new_url,
-                          const ResourceResponseHead& response_head);
-  void OnSetDataBuffer(int request_id,
-                       base::SharedMemoryHandle shm_handle,
-                       int shm_size,
-                       base::ProcessId renderer_pid);
-  void OnReceivedData(int request_id,
-                      int data_offset,
-                      int data_length,
-                      int encoded_data_length);
-  void OnDownloadedData(int request_id, int data_len, int encoded_data_length);
+  void OnReceivedRedirect(
+      int request_id,
+      const GURL& new_url,
+      const ResourceResponseHead& response_head);
+  void OnSetDataBuffer(
+      int request_id,
+      base::SharedMemoryHandle shm_handle,
+      int shm_size,
+      base::ProcessId renderer_pid);
+  void OnReceivedData(
+      int request_id,
+      int data_offset,
+      int data_length,
+      int encoded_data_length);
+  void OnDownloadedData(
+      int request_id,
+      int data_len,
+      int encoded_data_length);
   void OnRequestComplete(
       int request_id,
-      const ResourceMsg_RequestCompleteData& request_complete_data);
+      const ResourceMsg_RequestCompleteData &request_complete_data);
 
   // Dispatch the message to one of the message response handlers.
   void DispatchMessage(const IPC::Message& message);
 
   // Dispatch any deferred messages for the given request, provided it is not
   // again in the deferred state.
   void FlushDeferredMessages(int request_id);
 
   void ToResourceResponseInfo(
       const PendingRequestInfo& request_info,
@@ skipping 16 matching lines @@
   // handle in it that we should cleanup it up nicely. This method accepts any
   // message and determine whether the message is
   // ViewHostMsg_Resource_DataReceived and clean up the shared memory handle.
   static void ReleaseResourcesInDataMessage(const IPC::Message& message);
 
   // Iterate through a message queue and clean up the messages by calling
   // ReleaseResourcesInDataMessage and removing them from the queue. Intended
   // for use on deferred message queues that are no longer needed.
   static void ReleaseResourcesInMessageQueue(MessageQueue* queue);
 
-  scoped_ptr<ResourceHostMsg_Request> CreateRequest(
-      const RequestInfo& request_info,
-      ResourceRequestBody* request_body,
-      GURL* frame_origin);
-
   IPC::Sender* message_sender_;
 
   // All pending requests issued to the host
   PendingRequestList pending_requests_;
 
   base::WeakPtrFactory<ResourceDispatcher> weak_factory_;
 
   ResourceDispatcherDelegate* delegate_;
 
   // IO thread timestamp for ongoing IPC message.
   base::TimeTicks io_timestamp_;
 
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcher);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_RESOURCE_DISPATCHER_H_