[Chromecast] Upgrade to new CMA backend API

chromecast/media/cma/adapter/BUILD.gn

Index: chromecast/media/cma/adapter/BUILD.gn
diff --git a/chromecast/media/cma/adapter/BUILD.gn b/chromecast/media/cma/adapter/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..1ec6b715bc0f8d94762c706516b8011077c48d46
--- /dev/null
+++ b/chromecast/media/cma/adapter/BUILD.gn
@@ -0,0 +1,25 @@
+# Copyright 2015 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.
+
+source_set("adapter") {
+  sources = [
+    "audio_pipeline_device.h",
+    "backend_adapter.cc",
+    "backend_adapter.h",
+    "media_clock_device.h",
+    "media_component_device.h",
+    "media_pipeline_device.h",
+    "video_pipeline_device.h",
+  ]
+
+  public_deps = [
+    "//chromecast/public/media",
+  ]
+
+  deps = [
+    "//base",
+  ]
+
+  configs += [ "//chromecast:config" ]
+}