Extracted shell_interfaces and shell_public into a separate gyp file.

content/content_browser.gypi

 # 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base_static',
     '../cc/cc.gyp:cc',
     '../cc/cc.gyp:cc_surfaces',
     '../components/components.gyp:display_compositor',
@@ skipping 15 matching lines @@
     '../gpu/gpu.gyp:gpu_ipc_common',
     '../mojo/mojo_base.gyp:mojo_geometry_lib',
     '../mojo/mojo_base.gyp:mojo_url_type_converters',
     '../mojo/mojo_public.gyp:mojo_cpp_bindings',
     '../mojo/mojo_public.gyp:mojo_js_bindings',
     '../net/net.gyp:http_server',
     '../net/net.gyp:net',
     '../net/net.gyp:net_extras',
     '../sandbox/sandbox.gyp:sandbox',
     '../services/shell/shell.gyp:shell_lib',
-    '../services/shell/shell.gyp:shell_public',
     '../services/shell/shell.gyp:shell_runner_common_lib',
     '../services/shell/shell.gyp:shell_runner_host_lib',
+    '../services/shell/shell_public.gyp:shell_public',
     '../services/tracing/tracing.gyp:tracing_lib',
     '../services/tracing/tracing.gyp:tracing_public',
     '../services/user/user.gyp:user_service_lib',
     '../services/user/user.gyp:user_service_public_lib',
     '../skia/skia.gyp:skia',
     '../skia/skia.gyp:skia_mojo',
     '../sql/sql.gyp:sql',
     '../storage/storage_browser.gyp:storage',
     '../storage/storage_common.gyp:storage_common',
     '../third_party/angle/src/angle.gyp:commit_id',
@@ skipping 2163 matching lines @@
       ],
     }],
     ['OS != "mac" and OS != "android"', {
       'sources!': [
         'browser/gpu/gpu_surface_tracker.cc',
         'browser/gpu/gpu_surface_tracker.h',
       ],
     }],
   ],
 }