Make mojo_system static and mojo_system_impl a component, never use both

mojo/mojo_services.gypi

Index: mojo/mojo_services.gypi
diff --git a/mojo/mojo_services.gypi b/mojo/mojo_services.gypi
index f2106a7dd626b54a3427ba3acd3501593cb19940..208f14bbca463333afdc61a1d222b05318c55cfe 100644
--- a/mojo/mojo_services.gypi
+++ b/mojo/mojo_services.gypi
@@ -16,12 +16,10 @@
       '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',
       ],
     },
     {
@@ -55,16 +53,14 @@
       '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',
@@ -75,6 +71,7 @@
         'mojo_gles2_service',
         'mojo_native_viewport_bindings',
         'mojo_shell_client',
+        'mojo_system_impl',
       ],
       'defines': [
         'MOJO_NATIVE_VIEWPORT_IMPLEMENTATION',