Add ChildMemoryCoordinator::PurgeMemory()

content/renderer/render_thread_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.
 
 #include "content/renderer/render_thread_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <map>
 #include <utility>
@@ skipping 1652 matching lines @@
 void RenderThreadImpl::OnProcessPurgeAndSuspend() {
   ChildThreadImpl::OnProcessPurgeAndSuspend();
   if (!RendererIsHidden())
     return;
 
   // TODO(bashi): Enable the tab suspension when MemoryCoordinator is enabled.
   if (base::FeatureList::IsEnabled(features::kMemoryCoordinator))
     return;
 
   if (base::FeatureList::IsEnabled(features::kPurgeAndSuspend)) {
-    // TODO(tasak): After enabling MemoryCoordinator, remove this Notify

[bashi, 2017/02/02 19:47:00]

I think we can remove this comment because we could enable kPurgeAndSuspended by
default without stabilizing memory coordinator.

[tasak, 2017/02/03 04:09:33]

I agree with you.

-    // and follow MemoryCoordinator's request.
-    base::MemoryCoordinatorClientRegistry::GetInstance()->Notify(
-        base::MemoryState::SUSPENDED);
+    memory_coordinator_->PurgeMemory();
   }
   // Since purging is not a synchronous task (e.g. v8 GC, oilpan GC, ...),
   // we need to wait until the task is finished. So wait 15 seconds and
   // update purge+suspend UMA histogram.
   // TODO(tasak): use MemoryCoordinator's callback to report purge+suspend
   // UMA when MemoryCoordinator is available.
   GetRendererScheduler()->DefaultTaskRunner()->PostDelayedTask(
       FROM_HERE, record_purge_suspend_metric_closure_.callback(),
       base::TimeDelta::FromSeconds(15));
 }
@@ skipping 753 matching lines @@
   }
 }
 
 void RenderThreadImpl::OnRendererInterfaceRequest(
     mojom::RendererAssociatedRequest request) {
   DCHECK(!renderer_binding_.is_bound());
   renderer_binding_.Bind(std::move(request));
 }
 
 }  // namespace content