Reorganize Blink IDL build, delete obsolete GYP files.

third_party/WebKit/Source/modules/modules_generated.gypi

Index: third_party/WebKit/Source/modules/modules_generated.gypi
diff --git a/third_party/WebKit/Source/modules/modules_generated.gypi b/third_party/WebKit/Source/modules/modules_generated.gypi
deleted file mode 100644
index 452552422ac2b9ce36d652f1d25866195c9500d2..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/modules/modules_generated.gypi
+++ /dev/null
@@ -1,9 +0,0 @@
-# Copyright 2014 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.
-
-{
-  'variables': {
-    'blink_modules_output_dir': '<(SHARED_INTERMEDIATE_DIR)/blink/modules',
-  },
-}