views: Add a gyp file to build webview.

ui/views/controls/webview/webview.gyp

+# Copyright (c) 2012 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': 'webview',
+      'type': '<(component)',
+      'dependencies': [
+        '../../../../base/base.gyp:base',
+        '../../../../base/third_party/dynamic_annotations/dynamic_annotations.gyp:dynamic_annotations',
+        '../../../../skia/skia.gyp:skia',
+        '../../../../content/content.gyp:content',
+        '../../../ui.gyp:ui',
+        '../../views.gyp:views',
+      ],
+      'sources': [
+        'webview.cc',
+        'webview.h',
+      ],
+    },
+  ],
+}