arc-app-launcher: Minimal support for ARC app launcher.

components/arc.gypi

Index: components/arc.gypi
diff --git a/components/arc.gypi b/components/arc.gypi
index ccff1f346ce6e6cdca86b90df405fcd114eef28a..d34680a868588586b88b7404ac26df541e09ef7d 100644
--- a/components/arc.gypi
+++ b/components/arc.gypi
@@ -19,11 +19,28 @@
       'sources': [
         'arc/arc_bridge_service.cc',
         'arc/arc_bridge_service.h',
+        'arc/arc_bridge_service_impl.cc',
+        'arc/arc_bridge_service_impl.h',
         'arc/common/arc_host_messages.h',
         'arc/common/arc_instance_messages.h',
         'arc/common/arc_message_generator.cc',
         'arc/common/arc_message_generator.h',
       ],
     },
+    {
+      # GN version: //components/test_support
+      'target_name': 'test_support',
+      'type': 'static_library',
+      'sources': [
+        'arc/test/fake_arc_bridge_service.cc',
+        'arc/test/fake_arc_bridge_service.h',
+      ],
+      'dependencies': [
+        'arc',
+        '../chrome/chrome.gyp:browser_ui',
+        '../ui/app_list/app_list.gyp:app_list',
+        '../ui/gfx/gfx.gyp:gfx',
+      ],
+    },
   ],
 }