LowMemoryManagement: Deprecate unnecessary calls to Android.

chrome/browser/memory/tab_manager_delegate_chromeos.cc

 // Copyright 2015 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 "chrome/browser/memory/tab_manager_delegate_chromeos.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 347 matching lines @@
 }
 
 void TabManagerDelegate::OnInstanceReady() {
   auto* arc_bridge_service = arc::ArcBridgeService::Get();
   DCHECK(arc_bridge_service);
 
   arc_process_instance_ = arc_bridge_service->process()->instance();
   arc_process_instance_version_ = arc_bridge_service->process()->version();
 
   DCHECK(arc_process_instance_);
-
-  if (!IsArcMemoryManagementEnabled())
-    return;
-
-  if (arc_process_instance_version_ < 2) {
-    VLOG(1) << "ProcessInstance version < 2 does not "
-               "support DisableBuiltinOomAdjustment() yet.";
-    return;
-  }
-  // Stop Android system-wide oom_adj adjustment since this class will
-  // take over oom_score_adj settings.
-  arc_process_instance_->DisableBuiltinOomAdjustment();
-
-  if (arc_process_instance_version_ < 3) {
-    VLOG(1) << "arc::ProcessInstance version < 3 does not "
-               "support DisableLowMemoryKiller() yet.";
-    return;
-  }
-  VLOG(2) << "Disable LowMemoryKiller";
-  arc_process_instance_->DisableLowMemoryKiller();
 }
 
 void TabManagerDelegate::OnInstanceClosed() {
   arc_process_instance_ = nullptr;
   arc_process_instance_version_ = 0;
 }
 
 // TODO(cylee): Remove this function if Android process OOM score settings
 // is moved back to Android.
 // For example, negotiate non-overlapping OOM score ranges so Chrome and Android
@@ skipping 382 matching lines @@
     }
     priority += priority_increment;
   }
 
   if (oom_scores_to_change.size())
     GetDebugDaemonClient()->SetOomScoreAdj(
         oom_scores_to_change, base::Bind(&OnSetOomScoreAdj));
 }
 
 }  // namespace memory