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

webkit/glue/resource_loader_bridge.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.
 //
 // The intent of this file is to provide a type-neutral abstraction between
 // Chrome and WebKit for resource loading. This pure-virtual interface is
 // implemented by the embedder, which also provides a factory method Create
 // to instantiate this object.
 //
 // One of these objects will be created by WebKit for each request. WebKit
@@ skipping 73 matching lines @@
   // within webkit. The Peer and it's bridge should have identical lifetimes
   // as they represent each end of a communication channel.
   //
   // These callbacks mirror URLRequest::Delegate and the order and conditions
   // in which they will be called are identical. See url_request.h for more
   // information.
   class Peer {
    public:
     virtual ~Peer() {}
 
+    // Called as download progress is made.
+    // note: only for requests with LOAD_ENABLE_DOWNLOAD_FILE set and the
+    // resource is downloaded to a standalone file and the file handle to it is
+    // passed in ResponseInfo during OnReceivedResponse. Note that size may be
+    // unknown and |size| will be kuint64max in that case.
+    virtual void OnDownloadProgress(uint64 position, uint64 size) {}
+
     // Called as upload progress is made.
     // note: only for requests with LOAD_ENABLE_UPLOAD_PROGRESS set
     virtual void OnUploadProgress(uint64 position, uint64 size) = 0;
 
     // Called when a redirect occurs.
     virtual void OnReceivedRedirect(const GURL& new_url) = 0;
 
     // Called when response headers are available (after all redirects have
     // been followed).  |content_filtered| is set to true if the contents is
     // altered or replaced (usually for security reasons when the resource is
     // deemed unsafe).
     virtual void OnReceivedResponse(const ResponseInfo& info,
                                     bool content_filtered) = 0;
 
-    // Called when a chunk of response data is available.  This method may
+    // Called when a chunk of response data is available. This method may
     // be called multiple times or not at all if an error occurs.
     virtual void OnReceivedData(const char* data, int len) = 0;
 
     // Called when the response is complete.  This method signals completion of
     // the resource load.ff
     virtual void OnCompletedRequest(const URLRequestStatus& status,
                                     const std::string& security_info) = 0;
 
     // Returns the URL of the request, which allows us to display it in
     // debugging situations.
@@ skipping 84 matching lines @@
   // construction must go through Create()
   ResourceLoaderBridge();
 
  private:
   DISALLOW_EVIL_CONSTRUCTORS(ResourceLoaderBridge);
 };
 
 }  // namespace webkit_glue
 
 #endif  // RESOURCE_LOADER_BRIDGE_