arc: enable Android tracing in verified-boot mode

chromeos/dbus/fake_arc_trace_agent.h

Index: chromeos/dbus/fake_arc_trace_agent.h
diff --git a/chromeos/dbus/fake_arc_trace_agent.h b/chromeos/dbus/fake_arc_trace_agent.h
new file mode 100644
index 0000000000000000000000000000000000000000..6dc62553a1add444f83982602c1d9c2fc8389038
--- /dev/null
+++ b/chromeos/dbus/fake_arc_trace_agent.h
@@ -0,0 +1,41 @@
+// 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 CHROMEOS_DBUS_FAKE_ARC_TRACE_AGENT_H_
+#define CHROMEOS_DBUS_FAKE_ARC_TRACE_AGENT_H_
+
+#include <string>
+
+#include "chromeos/dbus/arc_trace_agent.h"
+
+namespace chromeos {
+
+// A wrapper for controlling system tracing on Chrome OS.
+class CHROMEOS_EXPORT FakeArcTraceAgent : public ArcTraceAgent {
+ public:
+  FakeArcTraceAgent();
+  ~FakeArcTraceAgent() override;
+
+  // ArcTraceAgent overrides:
+  void SetDelegate(Delegate* delegate) override;
+  void SetStopAgentTracingTaskRunner(
+      scoped_refptr<base::TaskRunner> task_runner) override;
+
+  // base::trace_event::TracingAgent overrides:
+  std::string GetTracingAgentName() override;
+  std::string GetTraceEventLabel() override;
+  void StartAgentTracing(const base::trace_event::TraceConfig& trace_config,
+                         const StartAgentTracingCallback& callback) override;
+  void StopAgentTracing(const StopAgentTracingCallback& callback) override;
+
+  // DBusClient overrides:
+  void Init(dbus::Bus* bus) override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(FakeArcTraceAgent);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROMEOS_DBUS_FAKE_ARC_TRACE_AGENT_H_