Move mojom to public/dart

mojo/public/dart/mojom/BUILD.gn

Index: mojo/public/dart/mojom/BUILD.gn
diff --git a/mojo/dart/mojom/BUILD.gn b/mojo/public/dart/mojom/BUILD.gn
similarity index 80%
rename from mojo/dart/mojom/BUILD.gn
rename to mojo/public/dart/mojom/BUILD.gn
index 70ff7da59f4f15e72fac828c114da29c9804e509..d54a69a2a104c86b2213f5053058ceadca845fda 100644
--- a/mojo/dart/mojom/BUILD.gn
+++ b/mojo/public/dart/mojom/BUILD.gn
@@ -2,7 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//mojo/public/dart/rules.gni")
+import("../rules.gni")
 
 dart_pkg("mojom") {
   libs = [ "lib/generate.dart" ]
@@ -13,7 +13,4 @@ dart_pkg("mojom") {
     "lib/src/utils.dart",
     "pubspec.yaml",
   ]
-  deps = [
-    "//third_party/dart-pkg",
-  ]
 }