Shape Detection: Implement FaceDetection on Mac as out-of-process service

content/public/app/mojo/content_browser_manifest.json

 {
   "name": "content_browser",
   "display_name": "Content (browser process)",
   "interface_provider_specs": {
     "service_manager:connector": {
       "provides": {
         "plugin": [
           "discardable_memory::mojom::DiscardableSharedMemoryManager",
           "ui::mojom::Gpu"
         ],
@@ skipping 37 matching lines @@
         "content_gpu": [ "browser" ],
         "content_plugin": [ "browser" ],
         "content_renderer": [ "browser" ],
         "content_utility": [ "browser" ],
         "service_manager": [
           "service_manager:client_process",
           "service_manager:instance_name",
           "service_manager:user_id"
         ],
         "file": [ "file:filesystem", "file:leveldb" ],
-        "media": [ "media:media" ]
+        "media": [ "media:media" ],
+        "shape_detection": [
+          "barcode_detection",
+          "face_detection"
+        ]
       }
     },
     "navigation:frame": {
       "provides": {
         "renderer": [
           // TODO(beng): these belong in //chrome's overlay, but there are some
           // issues with mash browser_tests's manifest config that make this
           // impossible this week. Remove once sky/ken fix this.
           "autofill::mojom::AutofillDriver",
           "autofill::mojom::PasswordManagerDriver",
@@ skipping 23 matching lines @@
           "shape_detection::mojom::TextDetection",
           "ui::mojom::Gpu"
         ]
       },
       "requires": {
         "content_renderer": [ "browser" ]
       }
     }
   }
 }