IPC messages and changes to ResourceLoaderBridge to support resource loading for media

chrome/common/render_messages_internal.h

 // Copyright (c) 2006-2008 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 <string>
 #include <vector>
@@ skipping 156 matching lines @@
 
   // Sent when the user wants to search for a word on the page (find in page).
   // Request parameters are passed in as a FindInPageMsg_Request struct.
   IPC_MESSAGE_ROUTED1(ViewMsg_Find, FindInPageRequest)
 
   // Sent when the headers are available for a resource request.
   IPC_MESSAGE_ROUTED2(ViewMsg_Resource_ReceivedResponse,
                       int /* request_id */,
                       ResourceResponseHead)
 
-  // Sent as upload progress is being made
+  // 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.
   IPC_MESSAGE_ROUTED2(ViewMsg_Resource_ReceivedRedirect,
                       int /* request_id */,
                       GURL /* new_url */)
 
@@ skipping 915 matching lines @@
   // message.
   IPC_MESSAGE_ROUTED1(ViewHostMsg_DataReceived_ACK,
                       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 when the renderer process to acknowlege receipt of and UploadProgress
-  // message.
+  // 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 */)
 
   // Duplicates a shared memory handle from the renderer to the browser. Then
   // the renderer can flush the handle.
   IPC_SYNC_MESSAGE_ROUTED1_1(ViewHostMsg_DuplicateSection,
                              base::SharedMemoryHandle /* renderer handle */,
                              base::SharedMemoryHandle /* browser handle */)
 
   // Provide the browser process with information about the WebCore resource
@@ skipping 83 matching lines @@
   IPC_SYNC_MESSAGE_CONTROL1_1(ViewHostMsg_CreateDedicatedWorker,
                               GURL /* url */,
                               int /* route_id */)
 
   // Wraps an IPC message that's destined to the worker on the renderer->browser
   // hop.
   IPC_MESSAGE_CONTROL1(ViewHostMsg_ForwardToWorker,
                        IPC::Message /* message */)
 
 IPC_END_MESSAGES(ViewHost)