Highlights of changes:

1. Added entry to ResourceResponseHead so that it contains
   either a base::PlatformFile (OS_WIN) or
   base::FileDescriptor (OS_POSIX) for passing the file
   handle from browser to renderer process.
2. Also added IPC messages for reporting download progress
   and ACK message for it. ResourceLoaderBridge::Peer::OnDownloadProgress
   is added so that the peer is notified of the download
   progress in the renderer process.
3. Load flag to kick start the resource loading for media
   files. LOAD_MEDIA_RESOURCE is added so that
   ResourceDispatcherHost knows how to use a different
   ResourceHandler for handling media resource request.

Review URL: http://codereview.chromium.org/27168

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@11661 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 19 insertions, 0 deletions

diff --git a/chrome/browser/renderer_host/resource_handler.h b/chrome/browser/renderer_host/resource_handler.h
index 2b843f9..e0713d9 100644
--- a/chrome/browser/renderer_host/resource_handler.h
+++ b/chrome/browser/renderer_host/resource_handler.h
@@ -14,6 +14,11 @@
 
 #include <string>
 
+#include "build/build_config.h"
+#if defined(OS_POSIX)
+#include "base/file_descriptor_posix.h"
+#endif
+#include "base/platform_file.h"
 #include "chrome/common/filter_policy.h"
 #include "net/url_request/url_request_status.h"
 #include "webkit/glue/resource_loader_bridge.h"
@@ -31,6 +36,20 @@ struct ResourceResponseHead
   // Specifies if the resource should be filtered before being displayed
   // (insecure resources can be filtered to keep the page secure).
   FilterPolicy::Type filter_policy;
+
+  // A platform specific handle for a file that carries response data. This
+  // entry is used if the resource request is of type ResourceType::MEDIA and
+  // the underlying cache layer keeps the response data in a standalone file.
+#if defined(OS_POSIX)
+  // If the response data file is available, the file handle is stored in
+  // response_data_file.fd, its value is base::kInvalidPlatformFileValue
+  // otherwise.
+  base::FileDescriptor response_data_file;
+#elif defined(OS_WIN)
+  // An asynchronous file handle to the response data file, its value is
+  // base::kInvalidPlatformFileValue if the file is not available.
+  base::PlatformFile response_data_file;
+#endif
 };
 
 // Parameters for a synchronous resource response.