ResourceScheduler should use renderer notifications instead of MRUCache to track renderers.

content/browser/renderer_host/render_process_host_impl.cc

 // 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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 597 matching lines @@
   channel_->AddFilter(new GamepadBrowserMessageFilter());
   channel_->AddFilter(new ProfilerMessageFilter(PROCESS_TYPE_RENDERER));
   channel_->AddFilter(new HistogramMessageFilter());
   channel_->AddFilter(new HyphenatorMessageFilter(this));
 }
 
 int RenderProcessHostImpl::GetNextRoutingID() {
   return widget_helper_->GetNextRoutingID();
 }
 
-void RenderProcessHostImpl::CancelResourceRequests(int render_widget_id) {
-  widget_helper_->CancelResourceRequests(render_widget_id);
-}
-
 void RenderProcessHostImpl::SimulateSwapOutACK(
     const ViewMsg_SwapOut_Params& params) {
   widget_helper_->SimulateSwapOutACK(params);
 }
 
 bool RenderProcessHostImpl::WaitForBackingStoreMsg(
     int render_widget_id,
     const base::TimeDelta& max_delay,
     IPC::Message* msg) {
   // The post task to this thread with the process id could be in queue, and we
@@ skipping 511 matching lines @@
 
 void RenderProcessHostImpl::Attach(RenderWidgetHost* host,
                                    int routing_id) {
   render_widget_hosts_.AddWithID(host, routing_id);
 }
 
 void RenderProcessHostImpl::Release(int routing_id) {
   DCHECK(render_widget_hosts_.Lookup(routing_id) != NULL);
   render_widget_hosts_.Remove(routing_id);
 
-  // Make sure that all associated resource requests are stopped.
-  CancelResourceRequests(routing_id);
-
 #if defined(OS_WIN)
   // Dump the handle table if handle auditing is enabled.
   const CommandLine& browser_command_line =
       *CommandLine::ForCurrentProcess();
   if (browser_command_line.HasSwitch(switches::kAuditHandles) ||
       browser_command_line.HasSwitch(switches::kAuditAllHandles)) {
     DumpHandles();
 
     // We wait to close the channels until the child process has finished
     // dumping handles and sends us ChildProcessHostMsg_DumpHandlesDone.
@@ skipping 471 matching lines @@
   TRACE_EVENT0("renderer_host",
                "RenderWidgetHostImpl::OnCompositorSurfaceBuffersSwappedNoHost");
   AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
   ack_params.sync_point = 0;
   RenderWidgetHostImpl::AcknowledgeBufferPresent(route_id,
                                                  gpu_process_host_id,
                                                  ack_params);
 }
 
 }  // namespace content