Make mojo_system static and mojo_system_impl a component, never use both

mojo/mojo_services.gypi

 {
   'targets': [
     {
       'target_name': 'mojo_gles2_bindings',
       'type': 'static_library',
       'sources': [
         'services/gles2/command_buffer.mojom',
         'services/gles2/command_buffer_type_conversions.cc',
         'services/gles2/command_buffer_type_conversions.h',
         'services/gles2/mojo_buffer_backing.cc',
         'services/gles2/mojo_buffer_backing.h',
       ],
       'variables': {
         'mojom_base_output_dir': 'mojo',
       },
       'includes': [ 'public/tools/bindings/mojom_bindings_generator.gypi' ],
       'export_dependent_settings': [
         'mojo_bindings',
-        'mojo_system',
       ],
       'dependencies': [
         '../gpu/gpu.gyp:command_buffer_common',
         'mojo_bindings',
-        'mojo_system',
       ],
     },
     {
       'target_name': 'mojo_gles2_service',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../gpu/gpu.gyp:command_buffer_service',
         '../ui/gfx/gfx.gyp:gfx',
         '../ui/gfx/gfx.gyp:gfx_geometry',
@@ skipping 13 matching lines @@
       'type': 'static_library',
       'sources': [
         'services/native_viewport/native_viewport.mojom',
       ],
       'variables': {
         'mojom_base_output_dir': 'mojo',
       },
       'includes': [ 'public/tools/bindings/mojom_bindings_generator.gypi' ],
       'export_dependent_settings': [
         'mojo_bindings',
-        'mojo_system',
       ],
       'dependencies': [
         'mojo_bindings',
-        'mojo_system',
       ],
     },
     {
       'target_name': 'mojo_native_viewport_service',
-      'type': '<(component)',
+      'type': 'shared_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../ui/events/events.gyp:events',
         '../ui/gfx/gfx.gyp:gfx',
         '../ui/gfx/gfx.gyp:gfx_geometry',
         'mojo_common_lib',
         'mojo_environment_chromium',
         'mojo_gles2_service',
         'mojo_native_viewport_bindings',
         'mojo_shell_client',
+        'mojo_system',
       ],
       'defines': [
         'MOJO_NATIVE_VIEWPORT_IMPLEMENTATION',
       ],
       'sources': [
         'services/native_viewport/geometry_conversions.h',
         'services/native_viewport/native_viewport.h',
         'services/native_viewport/native_viewport_android.cc',
         'services/native_viewport/native_viewport_mac.mm',
         'services/native_viewport/native_viewport_service.cc',
@@ skipping 10 matching lines @@
         }],
         ['OS=="android"', {
           'dependencies': [
             'mojo_jni_headers',
           ],
         }],
       ],
     },
   ],
 }