[sensors] Introduce Generic Sensor API interfaces

device/sensors/public/interfaces/BUILD.gn

Index: device/sensors/public/interfaces/BUILD.gn
diff --git a/device/sensors/public/interfaces/BUILD.gn b/device/sensors/public/interfaces/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..fb4bc86e2cb94d1c4dd38b47fb93a9e4577187be
--- /dev/null
+++ b/device/sensors/public/interfaces/BUILD.gn
@@ -0,0 +1,12 @@
+# 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.
+
+import("//mojo/public/tools/bindings/mojom.gni")
+
+mojom("interfaces") {
+  sources = [
+    "sensor.mojom",
+    "sensor_provider.mojom",
+  ]
+}