[Device Service] Port ScreenOrientationListener into Device Service.

services/device/screen_orientation/BUILD.gn

Index: services/device/screen_orientation/BUILD.gn
diff --git a/services/device/screen_orientation/BUILD.gn b/services/device/screen_orientation/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..be91f8dd91f7353ceef30a2785911bc570e0d880
--- /dev/null
+++ b/services/device/screen_orientation/BUILD.gn
@@ -0,0 +1,41 @@
+# Copyright 2017 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("//build/config/features.gni")
+
+if (is_android) {
+  import("//build/config/android/rules.gni")  # For generate_jni().
+}
+
+source_set("screen_orientation") {
+  visibility = [ "//services/device:lib" ]
+
+  sources = [
+    "screen_orientation_listener_android.cc",
+    "screen_orientation_listener_android.h",
+  ]
+
+  deps = [
+    "//base",
+    "//mojo/public/cpp/bindings",
+  ]
+
+  public_deps = [
+    "//device/screen_orientation/public/interfaces",
+  ]
+
+  if (is_android) {
+    deps += [ ":screen_orientation_jni_headers" ]
+  }
+}
+
+if (is_android) {
+  generate_jni("screen_orientation_jni_headers") {
+    visibility = [ ":screen_orientation" ]
+    sources = [
+      "android/java/src/org/chromium/device/screen_orientation/ScreenOrientationListener.java",
+    ]
+    jni_package = "screen_orientation"
+  }
+}