Add MemoryCoordinatorDelegate

content/public/browser/memory_coordinator_delegate.h

+// Copyright 2016 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_PUBLIC_BROWSER_MEMORY_COORDINATOR_DELEGATE_H_
+#define CONTENT_PUBLIC_BROWSER_MEMORY_COORDINATOR_DELEGATE_H_
+
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+// A delegate class which is used by the memory coordinator.
+class CONTENT_EXPORT MemoryCoordinatorDelegate {
+ public:
+  static void Set(const base::WeakPtr<MemoryCoordinatorDelegate>& delegate);
+
+  // Returns true when a given renderer process can be suspended.
+  virtual bool CanSuspendRenderer(int render_process_id) = 0;
+
+ protected:
+  virtual ~MemoryCoordinatorDelegate() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_MEMORY_COORDINATOR_DELEGATE_H_