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 06f9cadd896e317857b2047e181d272ad61119e8..b75744aa803cf9bd4b589d0044ad7435f21bf987 100644
--- a/chrome/browser/resources/chromeos/chromevox/chromevox.gyp
+++ b/chrome/browser/resources/chromeos/chromevox/chromevox.gyp
@@ -23,6 +23,7 @@
         'content_script_loader_file': 'chromevox/injected/loader.js',
         'options_script_loader_file': 'chromevox/background/options_loader.js',
         'kbexplorer_loader_file': 'chromevox/background/kbexplorer_loader.js',
+        'template_manifest_path': 'manifest.json.jinja2',
       },
       'targets': [
         {
@@ -31,6 +32,8 @@
           'dependencies': [
             'chromevox_assets',
             'chromevox_static_files',
+            'chromevox_manifest',
+            'chromevox_guest_manifest',
             'chromevox_strings',
             'chromevox_uncompiled_js_files',
             '<(chromevox_third_party_dir)/chromevox.gyp:chromevox_third_party_resources',
@@ -64,6 +67,23 @@
           ],
         },
         {
+          'target_name': 'chromevox_manifest',
+          'type': 'none',
+          'variables': {
+            'output_manifest_path': '<(chromevox_dest_dir)/manifest.json',
+          },
+          'includes': [ 'generate_manifest.gypi', ],
+        },
+        {
+          'target_name': 'chromevox_guest_manifest',
+          'type': 'none',
+          'variables': {
+            'output_manifest_path': '<(chromevox_dest_dir)/manifest_guest.json',
+            'is_guest_manifest': 1,
+          },
+          'includes': [ 'generate_manifest.gypi', ],
+        },
+        {
           'target_name': 'chromevox_static_files',
           'type': 'none',
           'copies': [