Refactor compile_js.gypi to support script_args and closure_args

components/resources/enhanced_bookmarks/enhanced_bookmarks.gypi

+# Copyright 2015 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.
+{
+  'targets' :[
+    {
+      'target_name': 'get_salient_image_url',
+      'variables': {
+        'extra_args' : [
+          '<@(document_image_extractor_js_files)',
+          '--no-single-file',
+          '--output_wrapper',
+          '(function(){%output% return GetSalientImageUrl();})();',
+        ]
+      },
+      'includes': [
+        '../../../third_party/document_image_extractor/document_image_extractor_files.gypi',
+        '../../../third_party/closure_compiler/compile_js.gypi'
+      ],
+    },
+    {
+      'target_name': 'dom_initializer',
+      'variables': {
+        'extra_args' : [
+          '<@(dom_controller_js_files)',
+          '--no-single-file',
+          '--output_wrapper', '(function(){%output%})();',
+        ],
+      },
+      'includes': [
+        '../../../third_party/document_image_extractor/dom_controller_files.gypi',
+        '../../../third_party/closure_compiler/compile_js.gypi',
+      ],
+    },
+  ],
+}