[WIP not ready for review] ServiceWorker Download support.

content/common/frame_messages.h

 // Copyright 2013 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.
 
 // IPC messages for interacting with frames.
 // Multiply-included message file, hence no include guard.
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 560 matching lines @@
 #if defined(ENABLE_PLUGINS)
 IPC_STRUCT_TRAITS_BEGIN(content::PepperRendererInstanceData)
   IPC_STRUCT_TRAITS_MEMBER(render_process_id)
   IPC_STRUCT_TRAITS_MEMBER(render_frame_id)
   IPC_STRUCT_TRAITS_MEMBER(document_url)
   IPC_STRUCT_TRAITS_MEMBER(plugin_url)
   IPC_STRUCT_TRAITS_MEMBER(is_potentially_secure_plugin_context)
 IPC_STRUCT_TRAITS_END()
 #endif
 
+IPC_STRUCT_BEGIN(FrameHostMsg_DownloadUrl_Params)
+  IPC_STRUCT_MEMBER(int32_t, render_view_id)
+  IPC_STRUCT_MEMBER(int32_t, render_frame_id)
+  IPC_STRUCT_MEMBER(int32_t, service_worker_provider_id)
+  IPC_STRUCT_MEMBER(GURL, url)
+  IPC_STRUCT_MEMBER(content::Referrer, referrer)
+  IPC_STRUCT_MEMBER(base::string16, suggested_name)
+IPC_STRUCT_END()
+
 // -----------------------------------------------------------------------------
 // Messages sent from the browser to the renderer.
 
 IPC_MESSAGE_ROUTED4(FrameMsg_SetChildFrameSurface,
                     cc::SurfaceId /* surface_id */,
                     gfx::Size /* frame_size */,
                     float /* scale_factor */,
                     cc::SurfaceSequence /* sequence */)
 
 // Notifies the embedding frame that the process rendering the child frame's
@@ skipping 443 matching lines @@
 // If a cross-process navigation was started for the initial history load in
 // this subframe, this tries to cancel it to allow a client redirect to happen
 // instead.
 IPC_MESSAGE_ROUTED0(FrameHostMsg_CancelInitialHistoryLoad)
 
 // Notifies the browser that a frame finished loading.
 IPC_MESSAGE_ROUTED1(FrameHostMsg_DidFinishLoad,
                     GURL /* validated_url */)
 
 // Initiates a download based on user actions like 'ALT+click'.
-IPC_MESSAGE_CONTROL5(FrameHostMsg_DownloadUrl,
-                     int /* render_view_id */,
-                     int /* render_frame_id */,
-                     GURL /* url */,
-                     content::Referrer /* referrer */,
-                     base::string16 /* suggested_name */)
+IPC_MESSAGE_CONTROL1(FrameHostMsg_DownloadUrl, FrameHostMsg_DownloadUrl_Params)
 
 // Asks the browser to save a image (for <canvas> or <img>) from a data URL.
 // Note: |data_url| is the contents of a data:URL, and that it's represented as
 // a string only to work around size limitations for GURLs in IPC messages.
 IPC_MESSAGE_CONTROL3(FrameHostMsg_SaveImageFromDataURL,
                      int /* render_view_id */,
                      int /* render_frame_id */,
                      std::string /* data_url */)
 
 // Sent when after the onload handler has been invoked for the document
@@ skipping 459 matching lines @@
 // nearest find result in the sending frame.
 IPC_MESSAGE_ROUTED2(FrameHostMsg_GetNearestFindResult_Reply,
                     int /* nfr_request_id */,
                     float /* distance */)
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent FrameMsg, then ifdefs for platform specific FrameMsg, then
 // platform independent FrameHostMsg, then ifdefs for platform specific
 // FrameHostMsg.