Add copyright headers to remaining gyp files.

gyp/views.gyp

+# Copyright 2015 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
 # Views is the Skia windowing toolkit.
 # It provides:
 #  * A portable means of creating native windows.
 #  * Events.
 #  * Basic widgets and controls.
 
 {
   'targets': [
     {
       'target_name': 'views',
@@ skipping 128 matching lines @@
         'include_dirs': [
           '../include/views',
         ],
       },
       'export_dependent_settings': [
         'xml.gyp:xml',
       ],
     },
   ],
 }