Prepending view-source: does not load the source of the userscript.

content/common/resource_messages.h

 // Copyright (c) 2012 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 resource loading.
 
 // Multiply-included message file, hence no include guard.
 #include "base/shared_memory.h"
 #include "content/public/common/common_param_traits.h"
 #include "content/public/common/resource_response.h"
@@ skipping 40 matching lines @@
 IPC_STRUCT_TRAITS_END()
 
 // Parameters for a resource request.
 IPC_STRUCT_BEGIN(ResourceHostMsg_Request)
   // The request method: GET, POST, etc.
   IPC_STRUCT_MEMBER(std::string, method)
 
   // The requested URL.
   IPC_STRUCT_MEMBER(GURL, url)
 
+  // Whether or not we should allow the URL to download.
+  IPC_STRUCT_MEMBER(bool, allow_download)

[darin (slow to review), 2012/04/03 21:56:20]

any rhyme or reason for inserting this field here rather than just appending it
to the end?

+
   // Usually the URL of the document in the top-level window, which may be
   // checked by the third-party cookie blocking policy. Leaving it empty may
   // lead to undesired cookie blocking. Third-party cookie blocking can be
   // bypassed by setting first_party_for_cookies = url, but this should ideally
   // only be done if there really is no way to determine the correct value.
   IPC_STRUCT_MEMBER(GURL, first_party_for_cookies)
 
   // The referrer to use (may be empty).
   IPC_STRUCT_MEMBER(GURL, referrer)
 
@@ skipping 142 matching lines @@
                     int /* request_id */)
 
 // Sent by the renderer process to acknowledge receipt of a
 // UploadProgress message.
 IPC_MESSAGE_ROUTED1(ResourceHostMsg_UploadProgress_ACK,
                     int /* request_id */)
 
 // Sent when the renderer process deletes a resource loader.
 IPC_MESSAGE_CONTROL1(ResourceHostMsg_ReleaseDownloadedFile,
                      int /* request_id */)