GN files for running Closure Compiler

chrome/browser/resources/chromeos/braille_ime/BUILD.gn

Index: chrome/browser/resources/chromeos/braille_ime/BUILD.gn
diff --git a/chrome/browser/resources/chromeos/braille_ime/BUILD.gn b/chrome/browser/resources/chromeos/braille_ime/BUILD.gn
index 092cbce3bc1a7d61cb869c4cb6f49362ef09dd05..1c364ca9d5fb273e02ce0a3294504ef529b25b38 100644
--- a/chrome/browser/resources/chromeos/braille_ime/BUILD.gn
+++ b/chrome/browser/resources/chromeos/braille_ime/BUILD.gn
@@ -2,13 +2,32 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-assert(is_chromeos)
+import("//third_party/closure_compiler/compile_js2.gni")
 
-copy("braille_ime_manifest") {
-  sources = [
-    "manifest.json",
+if (is_chromeos) {
+  copy("braille_ime_manifest") {
+    source_files = [ "manifest.json" ]
+    outputs = [
+      "$root_out_dir/resources/chromeos/braille_ime/manifest.json",
+    ]
+  }
+}
+
+compile_js("compile_externs") {
+  source_files = [ "externs.js" ]
+}
+
+compile_js("compile_braille_ime") {
+  source_files = [ "braille_ime.js" ]
+  externs = [ "chrome_extensions.js" ]
+  deps = [
+    ":compile_externs",
   ]
-  outputs = [
-    "$root_out_dir/resources/chromeos/braille_ime/manifest.json",
+}
+
+compile_js("compile_main") {
+  source_files = [ "main.js" ]
+  deps = [
+    ":compile_braille_ime",
   ]
 }