IDL: Add build target for IDL dictionary impl generation in core

Source/core/css/generated.gyp

Index: Source/core/css/generated.gyp
diff --git a/Source/core/css/generated.gyp b/Source/core/css/generated.gyp
new file mode 100644
index 0000000000000000000000000000000000000000..25bc3f4cb3e7dc3e4fed4a717c0e8ef1decc59f0
--- /dev/null
+++ b/Source/core/css/generated.gyp
@@ -0,0 +1,16 @@
+# Copyright (c) 2014 The Chromium Authors. All rights reserved.

[haraken, 2014/07/30 19:57:36]

We might want to avoid creating generated.gyp to each sub-directories of core/.
Probably can we add this code to core_generated.gyp?

[bashi, 2014/07/31 02:34:05]

Yeah, adding generated.gyp look a bit tricky and things got complicated more
than I expected. I'll try another approach.

+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'targets': [{
+    'target_name': 'idl_dictionary_core_css_generated',
+    'type': 'none',
+    'includes': [
+      '../../bindings/dictionaries.gypi',
+    ],
+    'sources': [
+      'FontFaceDescriptors.idl',

[bashi, 2014/07/30 11:32:26]

Another place where we need to list dictionary IDL files.

+    ],
+  }],
+}