Move c/b/media/router/mojo/*.mojom to chrome/common/media_router/mojo/*.mojom

media/router/mojo/BUILD.gn

+# 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("//mojo/public/tools/bindings/mojom.gni")
+
+mojom("media_controller") {
+  sources = [
+    "media_controller.mojom",
+    "media_status.mojom",
+  ]
+
+  public_deps = [
+    "//mojo/common:common_custom_types",
+  ]
+}
+
+mojom("media_router") {
+  sources = [
+    "media_router.mojom",
+  ]
+
+  public_deps = [
+    ":media_controller",
+    "//mojo/common:common_custom_types",
+    "//net/interfaces:interfaces",
+    "//url/mojo:url_mojom_gurl",
+    "//url/mojo:url_mojom_origin",
+  ]
+}
+
+mojom("media_router_test_interfaces") {
+  sources = [
+    "media_router_traits_test_service.mojom",
+  ]
+
+  public_deps = [
+    ":media_router",
+  ]
+}