Support automatic javascript test registry in gtest when creating WebUI tests.

chrome/chrome_tests.gypi

Index: chrome/chrome_tests.gypi
diff --git a/chrome/chrome_tests.gypi b/chrome/chrome_tests.gypi
index 2f9ef004c1d051958bb6cce3885e272adb73a4d3..fcf7efc3b0e3dccbe5f76a147d4ad2ac98c4eeb5 100644
--- a/chrome/chrome_tests.gypi
+++ b/chrome/chrome_tests.gypi
@@ -2288,6 +2288,7 @@
         '../third_party/icu/icu.gyp:icui18n',
         '../third_party/icu/icu.gyp:icuuc',
         '../v8/tools/gyp/v8.gyp:v8',
+        '../v8/tools/gyp/v8.gyp:v8_shell',
         '../webkit/webkit.gyp:test_shell_test_support',
         # Runtime dependencies
         '../third_party/mesa/mesa.gyp:osmesa',
@@ -2552,6 +2553,26 @@
         '../content/renderer/render_widget_browsertest.h',
         '../content/renderer/v8_value_converter_browsertest.cc',
       ],
+      'actions': [
+        {
+          'action_name': 'js2webui',
+          'variables': {
+            'gypv8sh': '../tools/gypv8sh.py',
+            'js2webui': 'browser/ui/webui/javascript2webui.js',
+          },
+          'inputs': [
+            '<(gypv8sh)',
+            '<(js2webui)',
+            '<!@(python <(gypv8sh) -i)',
+          ],
+          'outputs': [
+            '<!@(python <(gypv8sh) -o)',
+          ],
+          'action': [
+            'python', '<(gypv8sh)', '-p', '<(PRODUCT_DIR)', '<(js2webui)',
+          ],
+        },
+      ],
       'conditions': [
         ['chromeos==0', {
           'sources/': [