TabManager: Set OOM scores via a new debugd interface on ChromeOS.

chromeos/dbus/debug_daemon_client.h

 // 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.
 
 #ifndef CHROMEOS_DBUS_DEBUG_DAEMON_CLIENT_H_
 #define CHROMEOS_DBUS_DEBUG_DAEMON_CLIENT_H_
 
 #include <stdint.h>
+#include <sys/types.h>
 
 #include <map>
+#include <string>
+#include <vector>
 
 #include "base/callback.h"
 #include "base/files/file.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/task_runner.h"
 #include "base/trace_event/tracing_agent.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/dbus/dbus_client.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
@@ skipping 166 matching lines @@
   virtual void UploadCrashes() = 0;
 
   // A callback for WaitForServiceToBeAvailable().
   typedef base::Callback<void(bool service_is_ready)>
       WaitForServiceToBeAvailableCallback;
 
   // Runs the callback as soon as the service becomes available.
   virtual void WaitForServiceToBeAvailable(
       const WaitForServiceToBeAvailableCallback& callback) = 0;
 
+  // A callback for SetOomScoreAdj().
+  typedef base::Callback<void(bool success, const std::string& output)>
+      SetOomScoreAdjCallback;
+
+  // Set OOM score oom_score_adj for some process.
+  // Note that the corresponding DBus configuration of the debugd method
+  // "SetOomScoreAdj" only permits setting OOM score for processes running by
+  // user chronos or Android apps.
+  virtual void SetOomScoreAdj(
+      const std::map<pid_t, int32_t>& pid_to_oom_score_adj,
+      const SetOomScoreAdjCallback& callback) = 0;
+
   // Factory function, creates a new instance and returns ownership.
   // For normal usage, access the singleton via DBusThreadManager::Get().
   static DebugDaemonClient* Create();
 
  protected:
   // Create() should be used instead.
   DebugDaemonClient();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DebugDaemonClient);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_DBUS_DEBUG_DAEMON_CLIENT_H_