Reorganize Blink IDL build, delete obsolete GYP files.

third_party/WebKit/Source/bindings/modules/v8/custom/custom.gypi

Index: third_party/WebKit/Source/bindings/modules/v8/custom/custom.gypi
diff --git a/third_party/WebKit/Source/bindings/modules/v8/custom/custom.gypi b/third_party/WebKit/Source/bindings/modules/v8/custom/custom.gypi
deleted file mode 100644
index 02e1f27e99ae8179c54935c563b0e89ed329c5f8..0000000000000000000000000000000000000000
--- a/third_party/WebKit/Source/bindings/modules/v8/custom/custom.gypi
+++ /dev/null
@@ -1,18 +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': {
-        # Note: list duplicated in custom.gni.
-        'bindings_modules_v8_custom_files': [
-            'V8CustomSQLStatementErrorCallback.cpp',
-            'V8DeviceMotionEventCustom.cpp',
-            'V8ExtendableMessageEventCustom.cpp',
-            'V8IDBObserverCustom.cpp',
-            'V8ServiceWorkerMessageEventCustom.cpp',
-            'V8WebGLRenderingContextCustom.cpp',
-            'V8WebGL2RenderingContextCustom.cpp',
-        ],
-    },
-}