[NotForReview] An idea for experimenting purge & suspend

content/browser/renderer_host/render_process_host_impl.cc

 // Copyright 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 1247 matching lines @@
                  GetID()));
   AddUIThreadInterface(
       registry.get(),
       base::Bind(&RenderProcessHostImpl::CreateStoragePartitionService,
                  base::Unretained(this)));
   AddUIThreadInterface(
       registry.get(),
       base::Bind(&BroadcastChannelProvider::Connect,
                  base::Unretained(
                      storage_partition_impl_->GetBroadcastChannelProvider())));
-  if (base::FeatureList::IsEnabled(features::kMemoryCoordinator)) {
+  if (MemoryCoordinator::IsEnabled()) {
     AddUIThreadInterface(
         registry.get(), base::Bind(&CreateMemoryCoordinatorHandle, GetID()));
   }
 
   // BrowserMainLoop, which owns TimeZoneMonitor, is alive for the lifetime of
   // Mojo communication (see BrowserMainLoop::ShutdownThreadsAndCleanUp(),
   // which shuts down Mojo). Hence, passing that TimeZoneMonitor instance as
   // a raw pointer here is safe.
   AddUIThreadInterface(
       registry.get(),
@@ skipping 148 matching lines @@
   shared_worker_ref_count_ = 0;
   Cleanup();
 }
 
 bool RenderProcessHostImpl::IsWorkerRefCountDisabled() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   return is_worker_ref_count_disabled_;
 }
 
 void RenderProcessHostImpl::PurgeAndSuspend() {
-  Send(new ChildProcessMsg_PurgeAndSuspend());
+  if (base::FeatureList::IsEnabled(features::kPurgeAndSuspend)) {
+    MemoryCoordinator::GetInstance()->PurgeAndSuspendChild(GetID());
+  } else {
+    Send(new ChildProcessMsg_PurgeAndSuspend());
+  }
 }
 
 mojom::RouteProvider* RenderProcessHostImpl::GetRemoteRouteProvider() {
   if (!remote_route_provider_) {
     DCHECK(channel_);
     channel_->GetRemoteAssociatedInterface(&remote_route_provider_);
   }
   return remote_route_provider_.get();
 }
 
@@ skipping 1594 matching lines @@
   LOG(ERROR) << "Terminating render process for bad Mojo message: " << error;
 
   // The ReceivedBadMessage call below will trigger a DumpWithoutCrashing. Alias
   // enough information here so that we can determine what the bad message was.
   base::debug::Alias(&error);
   bad_message::ReceivedBadMessage(process.get(),
                                   bad_message::RPH_MOJO_PROCESS_ERROR);
 }
 
 }  // namespace content