PDF Plugin: Add dummy JS compilation target.

chrome/browser/resources/pdf/compiled_resources2.gyp

Index: chrome/browser/resources/pdf/compiled_resources2.gyp
diff --git a/chrome/browser/resources/pdf/compiled_resources2.gyp b/chrome/browser/resources/pdf/compiled_resources2.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..18fb1c80d29658846e14c4d4e06a3a2a7617d85f
--- /dev/null
+++ b/chrome/browser/resources/pdf/compiled_resources2.gyp
@@ -0,0 +1,14 @@
+# Copyright 2017 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': 'main',
+      'dependencies': [
+        # TODO(dpapad): Add dependencies here.
+      ],
+      'includes': ['../../../../third_party/closure_compiler/compile_js2.gypi'],
+    }
+  ],
+}