Allow huge data: URIs only via WebView.loadDataWithBaseUrl

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 "cc/surfaces/surface_id.h"
 #include "cc/surfaces/surface_sequence.h"
 #include "content/common/content_export.h"
@@ skipping 268 matching lines @@
   IPC_STRUCT_TRAITS_MEMBER(url)
   IPC_STRUCT_TRAITS_MEMBER(referrer)
   IPC_STRUCT_TRAITS_MEMBER(transition)
   IPC_STRUCT_TRAITS_MEMBER(navigation_type)
   IPC_STRUCT_TRAITS_MEMBER(allow_download)
   IPC_STRUCT_TRAITS_MEMBER(should_replace_current_entry)
   IPC_STRUCT_TRAITS_MEMBER(ui_timestamp)
   IPC_STRUCT_TRAITS_MEMBER(report_type)
   IPC_STRUCT_TRAITS_MEMBER(base_url_for_data_url)
   IPC_STRUCT_TRAITS_MEMBER(history_url_for_data_url)
+  IPC_STRUCT_TRAITS_MEMBER(data_url_as_string)
   IPC_STRUCT_TRAITS_MEMBER(lofi_state)
   IPC_STRUCT_TRAITS_MEMBER(navigation_start)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::BeginNavigationParams)
   IPC_STRUCT_TRAITS_MEMBER(method)
   IPC_STRUCT_TRAITS_MEMBER(headers)
   IPC_STRUCT_TRAITS_MEMBER(load_flags)
   IPC_STRUCT_TRAITS_MEMBER(has_user_gesture)
   IPC_STRUCT_TRAITS_MEMBER(skip_service_worker)
@@ skipping 963 matching lines @@
 IPC_MESSAGE_ROUTED1(FrameHostMsg_ShowPopup,
                     FrameHostMsg_ShowPopup_Params)
 IPC_MESSAGE_ROUTED0(FrameHostMsg_HidePopup)
 
 #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.