Provide script/gypi support for manifest generation

chrome/browser/resources/chromeos/chromevox/chromevox.gyp

Index: chrome/browser/resources/chromeos/chromevox/chromevox.gyp
diff --git a/chrome/browser/resources/chromeos/chromevox/chromevox.gyp b/chrome/browser/resources/chromeos/chromevox/chromevox.gyp
index 6bc51f83b67b3b962c6422e3156176289ebab06a..dac3cfbeb8b99dddd32d39d3cb9eda1b84fa26a4 100644
--- a/chrome/browser/resources/chromeos/chromevox/chromevox.gyp
+++ b/chrome/browser/resources/chromeos/chromevox/chromevox.gyp
@@ -5,6 +5,7 @@
 {
   'variables': {
     'chromevox_dest_dir': '<(PRODUCT_DIR)/resources/chromeos/chromevox',
+    'template_manifest': 'manifest.json.jinja2',
   },
   'targets': [
     {
@@ -12,6 +13,8 @@
       'type': 'none',
       'dependencies': [
         'chromevox_assets',
+        'chromevox_manifest',
+        'chromevox_guest_manifest',
         'chromevox_static_files',
         'chromevox_strings',
         'chromevox_uncompiled_js_files',
@@ -181,5 +184,22 @@
         },
       ],
     },
+    {
+      'target_name': 'chromevox_manifest',
+      'type': 'none',
+      'variables': {
+        'output_manifest': '<(chromevox_dest_dir)/manifest.json',
+      },
+      'includes': [ 'generate_manifest.gypi', ],
+    },
+    {
+      'target_name': 'chromevox_guest_manifest',
+      'type': 'none',
+      'variables': {
+        'output_manifest': '<(chromevox_dest_dir)/manifest_guest.json',
+        'is_guest_manifest': 1,
+      },
+      'includes': [ 'generate_manifest.gypi', ],
+    },
   ],
 }