Revert of MediaPerceptionPrivate API impl and testing.

extensions/browser/BUILD.gn

Index: extensions/browser/BUILD.gn
diff --git a/extensions/browser/BUILD.gn b/extensions/browser/BUILD.gn
index b2de911cf821c5373d08497cd264bbec61096d68..aa65f0d1f5edc3379247e228153dbda1cd07d928 100644
--- a/extensions/browser/BUILD.gn
+++ b/extensions/browser/BUILD.gn
@@ -369,15 +369,9 @@
     deps += [ "//extensions/shell:app_shell" ]
   }
   if (is_chromeos) {
-    sources += [
-      "api/media_perception_private/media_perception_private_apitest.cc",
-      "api/virtual_keyboard/virtual_keyboard_apitest.cc",
-    ]
-
-    deps += [
-      "//chromeos",
-      "//chromeos:media_perception_proto",
-    ]
+    sources += [ "api/virtual_keyboard/virtual_keyboard_apitest.cc" ]
+
+    deps += [ "//chromeos" ]
   }
 }
 
@@ -517,14 +511,9 @@
   if (is_chromeos) {
     sources += [
       "api/audio/audio_device_id_calculator_unittest.cc",
-      "api/media_perception_private/conversion_utils_unittest.cc",
-      "api/media_perception_private/media_perception_api_manager_unittest.cc",
       "api/webcam_private/visca_webcam_unittest.cc",
     ]
 
-    deps += [
-      "//chromeos:media_perception_proto",
-      "//chromeos:test_support",
-    ]
+    deps += [ "//chromeos:test_support" ]
   }
 }