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

chromeos/dbus/fake_debug_daemon_client.h

Index: chromeos/dbus/fake_debug_daemon_client.h
diff --git a/chromeos/dbus/fake_debug_daemon_client.h b/chromeos/dbus/fake_debug_daemon_client.h
index 01738d15c25258e9232c38f6a6c7b84ec64248a8..861dff4d2f1a9917803c89fd76366cba5cb2f1f0 100644
--- a/chromeos/dbus/fake_debug_daemon_client.h
+++ b/chromeos/dbus/fake_debug_daemon_client.h
@@ -67,6 +67,8 @@ class CHROMEOS_EXPORT FakeDebugDaemonClient : public DebugDaemonClient {
       const EnableDebuggingCallback& callback) override;
   void WaitForServiceToBeAvailable(
       const WaitForServiceToBeAvailableCallback& callback) override;
+  void SetOomScoreAdj(const std::map<int, int>& scores,
+                      const SetOomScoreAdjCallback& callback) override;
 
   // Sets debugging features mask for testing.
   virtual void SetDebuggingFeaturesStatus(int featues_mask);