Split //ui/gl into //ui/gl + //ui/gi/init.

ui/gl/init/gl_init.gyp

+# Copyright 2016 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': {
+    'chromium_code': 1,
+  },
+
+  'targets': [
+    {
+      'target_name': 'gl_init',
+      'type': '<(component)',
+      'dependencies': [
+        '../../../base/base.gyp:base',
+        '../../gfx/gfx.gyp:gfx',
+        '../../gfx/gfx.gyp:gfx_geometry',
+        '../gl.gyp:gl',
+      ],
+      'defines': [
+        'GL_INIT_IMPLEMENTATION',
+      ],
+      'sources': [
+        'gl_factory.cc',
+        'gl_factory.h',
+        'gl_init_export.h',
+      ],
+    },
+  ],
+}