GN files for running Closure Compiler

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

-# Copyright 2015 The Chromium Authors. All rights reserved.
+# Copyright 2016 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.
 
-assert(is_chromeos)
+import("//third_party/closure_compiler/compile_js2.gni")
 
-copy("braille_ime_manifest") {
-  sources = [
-    "manifest.json",
-  ]
-  outputs = [
-    "$root_out_dir/resources/chromeos/braille_ime/manifest.json",
+if (is_chromeos) {
+  copy("braille_ime_manifest") {
+    source_files = [ "manifest.json" ]
+    outputs = [
+      "$root_out_dir/resources/chromeos/braille_ime/manifest.json",
+    ]
+  }
+}
+
+compile_js("compile_externs") {
+  source_files = [ "externs.js" ]

[Dan Beam, 2016/09/06 16:46:46]

this should probably be "externs =" instead of "source_files =", right?

[aberent, 2016/09/06 17:30:22]

Actually no. The externs are for things in the closure compiler's externs
folder. braille_ime, however, has its own externs.js, which here, as in the GYP
file, has its own compile target.

+}
+
+compile_js("compile_braille_ime") {
+  source_files = [ "braille_ime.js" ]
+  externs = [ "chrome_extensions.js" ]
+  deps = [
+    ":compile_externs",
   ]
 }
+
+compile_js("compile_main") {
+  source_files = [ "main.js" ]
+  deps = [
+    ":compile_braille_ime",
+  ]
+}
+
+group("compile_js") {
+  deps = [
+    ":compile_braille_ime",
+    ":compile_externs",
+    ":compile_main",
+  ]
+}