[SafeBrowsing] Conditionalize unverified download blocking on whitelist.

content/common/view_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 page rendering.
 // Multiply-included message file, hence no include guard.
 
 #include "base/memory/shared_memory.h"
 #include "base/process/process.h"
 #include "base/strings/string16.h"
@@ skipping 200 matching lines @@
 
 IPC_STRUCT_TRAITS_BEGIN(content::FileChooserParams)
   IPC_STRUCT_TRAITS_MEMBER(mode)
   IPC_STRUCT_TRAITS_MEMBER(title)
   IPC_STRUCT_TRAITS_MEMBER(default_file_name)
   IPC_STRUCT_TRAITS_MEMBER(accept_types)
   IPC_STRUCT_TRAITS_MEMBER(need_local_path)
 #if defined(OS_ANDROID)
   IPC_STRUCT_TRAITS_MEMBER(capture)
 #endif
+  IPC_STRUCT_TRAITS_MEMBER(requestor)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(content::RendererPreferences)
   IPC_STRUCT_TRAITS_MEMBER(can_accept_load_drops)
   IPC_STRUCT_TRAITS_MEMBER(should_antialias_text)
   IPC_STRUCT_TRAITS_MEMBER(hinting)
   IPC_STRUCT_TRAITS_MEMBER(use_autohinter)
   IPC_STRUCT_TRAITS_MEMBER(use_bitmaps)
   IPC_STRUCT_TRAITS_MEMBER(subpixel_rendering)
   IPC_STRUCT_TRAITS_MEMBER(use_subpixel_positioning)
@@ skipping 1166 matching lines @@
 // Instructs the browser to start plugin IME.
 IPC_MESSAGE_ROUTED0(ViewHostMsg_StartPluginIme)
 
 // Receives content of a web page as plain text.
 IPC_MESSAGE_ROUTED1(ViewMsg_GetRenderedTextCompleted, std::string);
 #endif
 
 // Adding a new message? Stick to the sort order above: first platform
 // independent ViewMsg, then ifdefs for platform specific ViewMsg, then platform
 // independent ViewHostMsg, then ifdefs for platform specific ViewHostMsg.