Flesh out URLLoader's download_to_file function....

chrome/common/render_messages_internal.h

 // Copyright (c) 2010 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 header is meant to be included in multiple passes, hence no traditional
 // header guard.
 // See ipc_message_macros.h for explanation of the macros and passes.
 
 #include <map>
 #include <string>
@@ skipping 285 matching lines @@
   // Sent when the headers are available for a resource request.
   IPC_MESSAGE_ROUTED2(ViewMsg_Resource_ReceivedResponse,
                       int /* request_id */,
                       ResourceResponseHead)
 
   // Sent when cached metadata from a resource request is ready.
   IPC_MESSAGE_ROUTED2(ViewMsg_Resource_ReceivedCachedMetadata,
                       int /* request_id */,
                       std::vector<char> /* data */)
 
-  // Sent as download progress is being made, size of the resource may be
-  // unknown, in that case |size| is -1.
-  IPC_MESSAGE_ROUTED3(ViewMsg_Resource_DownloadProgress,
-                      int /* request_id */,
-                      int64 /* position */,
-                      int64 /* size */)
-
   // Sent as upload progress is being made.
   IPC_MESSAGE_ROUTED3(ViewMsg_Resource_UploadProgress,
                       int /* request_id */,
                       int64 /* position */,
                       int64 /* size */)
 
   // Sent when the request has been redirected.  The receiver is expected to
   // respond with either a FollowRedirect message (if the redirect is to be
   // followed) or a CancelRequest message (if it should not be followed).
   IPC_MESSAGE_ROUTED3(ViewMsg_Resource_ReceivedRedirect,
                       int /* request_id */,
                       GURL /* new_url */,
                       ResourceResponseHead)
 
   // Sent when some data from a resource request is ready. The handle should
   // already be mapped into the process that receives this message.
   IPC_MESSAGE_ROUTED3(ViewMsg_Resource_DataReceived,
                       int /* request_id */,
                       base::SharedMemoryHandle /* data */,
                       int /* data_len */)
 
+  // Sent when some data from a resource request has been downloaded to
+  // file. This is only called in the 'download_to_file' case and replaces
+  // ViewMsg_Resource_DataReceived in the call sequence in that case.
+  IPC_MESSAGE_ROUTED2(ViewMsg_Resource_DataDownloaded,
+                      int /* request_id */,
+                      int /* data_len */)
+
   // Sent when the request has been completed.
   IPC_MESSAGE_ROUTED4(ViewMsg_Resource_RequestComplete,
                       int /* request_id */,
                       URLRequestStatus /* status */,
                       std::string /* security info */,
                       base::Time /* completion_time */)
 
   // Sent when user prompting is required before a ViewHostMsg_GetCookies
   // message can complete.  This message indicates that the renderer should
   // pump messages while waiting for cookies.
@@ skipping 1521 matching lines @@
   // Get the CPBrowsingContext associated with the renderer sending this
   // message.
   IPC_SYNC_MESSAGE_CONTROL0_1(ViewHostMsg_GetCPBrowsingContext,
                               uint32 /* context */)
 
   // Sent when the renderer process is done processing a DataReceived
   // message.
   IPC_MESSAGE_ROUTED1(ViewHostMsg_DataReceived_ACK,
                       int /* request_id */)
 
+  // Sent when the renderer has processed a DataDownloaded message.
+  IPC_MESSAGE_ROUTED1(ViewHostMsg_DataDownloaded_ACK,
+                      int /* request_id */)
+
+  // Sent when the renderer process deletes a resource loader.
+  IPC_MESSAGE_CONTROL1(ViewHostMsg_ReleaseDownloadedFile,
+                       int /* request_id */)
+
   // Sent when a provisional load on the main frame redirects.
   IPC_MESSAGE_ROUTED3(ViewHostMsg_DidRedirectProvisionalLoad,
                       int /* page_id */,
                       GURL /* last url */,
                       GURL /* url redirected to */)
 
   // Sent by the renderer process to acknowledge receipt of a
-  // DownloadProgress message.
-  IPC_MESSAGE_ROUTED1(ViewHostMsg_DownloadProgress_ACK,
-                      int /* request_id */)
-
-  // Sent by the renderer process to acknowledge receipt of a
   // UploadProgress message.
   IPC_MESSAGE_ROUTED1(ViewHostMsg_UploadProgress_ACK,
                       int /* request_id */)
 
   // Sent when the renderer changes the zoom level for a particular url, so the
   // browser can update its records.
   IPC_MESSAGE_CONTROL2(ViewHostMsg_DidZoomURL,
                        GURL /* url */,
                        int /* zoom_level */)
 
@@ skipping 989 matching lines @@
   // Unregister a blob URL.
   IPC_MESSAGE_CONTROL1(ViewHostMsg_UnregisterBlobUrl, GURL /* url */)
 
   // Suggest results -----------------------------------------------------------
 
   IPC_MESSAGE_ROUTED2(ViewHostMsg_SetSuggestResult,
                       int32 /* page_id */,
                       std::string /* suggest */)
 
 IPC_END_MESSAGES(ViewHost)