arc: enable Android tracing in verified-boot mode

components/arc/common/trace.mojom

Index: components/arc/common/trace.mojom
diff --git a/components/arc/common/trace.mojom b/components/arc/common/trace.mojom
new file mode 100644
index 0000000000000000000000000000000000000000..403f20dcd6b618a66e6bde0ad9703118a4e3c5e2
--- /dev/null
+++ b/components/arc/common/trace.mojom
@@ -0,0 +1,19 @@
+// 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.
+
+// Next MinVersion: 1
+
+module arc.mojom;
+

[Yusuke Sato, 2017/01/04 23:55:48]

remove this line

[Earl Ou, 2017/01/16 14:05:46]

Done.

+
+interface TraceInstance {
+  // Query available tracing categories in the container.

[Yusuke Sato, 2017/01/04 23:55:48]

Queries (L11), Starts (L14), and Stops (L17)

[Earl Ou, 2017/01/16 14:05:45]

Done.

+  QueryAvailableCategories@2() => (array<string> categories);
+
+  // Start tracing in the container with the given categories.
+  StartTracing@0(array<string> categories) => (bool success);
+
+  // Stop tracing in the container.
+  StopTracing@1() => (bool success);
+};