Port chromevox build to GN.

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

Index: chrome/browser/resources/chromeos/braille_ime/BUILD.gn
diff --git a/chrome/browser/nacl_host/test/BUILD.gn b/chrome/browser/resources/chromeos/braille_ime/BUILD.gn
similarity index 53%
copy from chrome/browser/nacl_host/test/BUILD.gn
copy to chrome/browser/resources/chromeos/braille_ime/BUILD.gn
index fca5c76377681903d8f4a0741d4a3883fc13aa7a..25002e728fbc0452e89b3e4baebfffc0cd50a660 100644
--- a/chrome/browser/nacl_host/test/BUILD.gn
+++ b/chrome/browser/resources/chromeos/braille_ime/BUILD.gn
@@ -2,15 +2,13 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//build/config/features.gni")
-
-if (enable_nacl && (is_linux || is_win)) {
-  executable("mock_nacl_gdb") {
+if (is_chromeos) {
+  copy("braille_ime_manifest") {
     sources = [
-      "mock_nacl_gdb.cc",
+      "manifest.json",
     ]
-    deps = [
-      "//base",
+    outputs = [
+      "$root_out_dir/resources/chromeos/braille_ime/manifest.json",
     ]
   }
 }