Revert of [Cast,Android] Replace custom MediaController with android.widget.MediaController.

third_party/android_media/BUILD.gn

Index: third_party/android_media/BUILD.gn
diff --git a/third_party/android_media/BUILD.gn b/third_party/android_media/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..a4a375ae8764a8fc327958bd36987a7b1454033f
--- /dev/null
+++ b/third_party/android_media/BUILD.gn
@@ -0,0 +1,26 @@
+# 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.
+
+import("//build/config/android/rules.gni")
+
+assert(is_android)
+
+android_resources("android_media_resources") {
+  custom_package = "org.chromium.third_party.android.media"
+  resource_dirs = [ "java/res" ]
+  deps = [
+    "//third_party/android_tools:android_support_v7_appcompat_java",
+    "//third_party/android_tools:android_support_v7_mediarouter_java",
+  ]
+}
+
+android_library("android_media_java") {
+  java_files =
+      [ "java/src/org/chromium/third_party/android/media/MediaController.java" ]
+  deps = [
+    ":android_media_resources",
+    "//third_party/android_tools:android_support_v7_appcompat_java",
+    "//third_party/android_tools:android_support_v7_mediarouter_java",
+  ]
+}