MediaPerceptionPrivate API impl and testing.

extensions/browser/api/BUILD.gn

Index: extensions/browser/api/BUILD.gn
diff --git a/extensions/browser/api/BUILD.gn b/extensions/browser/api/BUILD.gn
index caf551d11e7e3b15f8bbfc50c30424f9ddbc1a7f..b17d2e25f272ccdf7c67aec01f5cfdd7cedc086d 100644
--- a/extensions/browser/api/BUILD.gn
+++ b/extensions/browser/api/BUILD.gn
@@ -106,6 +106,10 @@ source_set("api") {
 
   if (is_chromeos) {
     sources += [
+      "media_perception_private/conversion_utils.cc",
+      "media_perception_private/conversion_utils.h",
+      "media_perception_private/media_perception_api_manager.cc",
+      "media_perception_private/media_perception_api_manager.h",
       "media_perception_private/media_perception_private_api.cc",
       "media_perception_private/media_perception_private_api.h",
     ]
@@ -119,7 +123,10 @@ source_set("api") {
       "//extensions/browser/api/webcam_private",
     ]
 
-    deps += [ "//chromeos" ]
+    deps += [
+      "//chromeos",
+      "//chromeos:media_perception_proto",
+    ]
   }
 }