Report utility process JS memory in task manager.

content/browser/process_resource_usage_impl.h

+// 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.
+
+#ifndef CONTENT_BROWSER_PROCESS_RESOURCE_USAGE_IMPL_H_
+#define CONTENT_BROWSER_PROCESS_RESOURCE_USAGE_IMPL_H_
+
+#include "base/basictypes.h"
+#include "base/threading/thread_checker.h"
+#include "content/public/browser/process_resource_usage.h"
+#include "content/public/common/resource_usage_reporter.mojom.h"
+
+namespace content {
+
+class ProcessResourceUsageImpl : public ProcessResourceUsage {
+ public:
+  // Must be called from the same thread that created |service|.
+  explicit ProcessResourceUsageImpl(ResourceUsageReporterPtr service);
+  ~ProcessResourceUsageImpl() override;
+
+  // ProcessResourceUsage implementation.
+  void Refresh() override;
+  bool ReportsV8MemoryStats() const override;
+  size_t GetV8MemoryAllocated() const override;
+  size_t GetV8MemoryUsed() const override;
+
+ private:
+  // Mojo IPC callback.
+  void OnRefreshDone(ResourceUsageDataPtr data);
+
+  ResourceUsageReporterPtr service_;
+  bool update_in_progress_;
+
+  ResourceUsageDataPtr stats_;
+
+  base::ThreadChecker thread_checker_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProcessResourceUsageImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_PROCESS_RESOURCE_USAGE_IMPL_H_