Make PrerenderTracker's resource_throttle_io_thread_map_ use RenderFrame IDs instead of RenderView …

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.
 //
 // NOTE: All messages must send an |int request_id| as their first parameter.
 
 // Multiply-included message file, hence no include guard.
 #include "base/memory/shared_memory.h"
@@ skipping 122 matching lines @@
   // 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)
 
   // The referrer policy to use.
   IPC_STRUCT_MEMBER(blink::WebReferrerPolicy, referrer_policy)
 
+  // The frame's visiblity state.
+  IPC_STRUCT_MEMBER(blink::WebPageVisibilityState, visiblity_state)
+
   // Additional HTTP request headers.
   IPC_STRUCT_MEMBER(std::string, headers)
 
   // net::URLRequest load flags (0 by default).
   IPC_STRUCT_MEMBER(int, load_flags)
 
   // Process ID from which this request originated, or zero if it originated
   // in the renderer itself.
   // If kDirectNPAPIRequests isn't specified, then plugin requests get routed
   // through the renderer and and this holds the pid of the plugin process.
@@ skipping 164 matching lines @@
                      int /* request_id */)
 
 // Sent when the renderer process deletes a resource loader.
 IPC_MESSAGE_CONTROL1(ResourceHostMsg_ReleaseDownloadedFile,
                      int /* request_id */)
 
 // Sent by the renderer when a resource request changes priority.
 IPC_MESSAGE_CONTROL2(ResourceHostMsg_DidChangePriority,
                      int /* request_id */,
                      net::RequestPriority)