Move ScopedIPCSupport into its own build rule.

ipc/mojo/ipc_mojo.gyp

 # 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': {
     'chromium_code': 1,
   },
   'includes': [
   ],
@@ skipping 21 matching lines @@
         'ipc_mojo_bootstrap.h',
         'ipc_mojo_handle_attachment.cc',
         'ipc_mojo_handle_attachment.h',
         'ipc_mojo_message_helper.cc',
         'ipc_mojo_message_helper.h',
         'ipc_mojo_param_traits.cc',
         'ipc_mojo_param_traits.h',
         'ipc_message_pipe_reader.cc',
         'ipc_message_pipe_reader.h',
         'ipc.mojom',
-        'scoped_ipc_support.cc',
-        'scoped_ipc_support.h',
       ],
       # TODO(gregoryd): direct_dependent_settings should be shared with the
       # 64-bit target, but it doesn't work due to a bug in gyp
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
         ],
       },
     },
     {
+      'target_name': 'ipc_mojo_support',
+      'type': 'static_library',
+      'dependencies': [
+        '../../base/base.gyp:base',
+        '../../mojo/mojo_edk.gyp:mojo_system_impl',
+      ],
+      'sources': [
+        'scoped_ipc_support.cc',
+        'scoped_ipc_support.h',
+      ],
+    },
+    {
       'target_name': 'ipc_mojo_unittests',
       'type': '<(gtest_target_type)',
       'dependencies': [
         '../ipc.gyp:ipc',
         '../ipc.gyp:test_support_ipc',
         '../../base/base.gyp:base',
         '../../base/base.gyp:base_i18n',
         '../../base/base.gyp:test_support_base',
         '../../mojo/mojo_edk.gyp:mojo_common_test_support',
         '../../mojo/mojo_edk.gyp:mojo_system_impl',
@@ skipping 52 matching lines @@
             '../../build/isolate.gypi',
           ],
           'sources': [
             'ipc_mojo_unittests.isolate',
           ],
         },
       ],
     }],
   ],
 }