Refactor: Make MediaCaptureDevicesDispatcher have pluggable handlers.

extensions/common/extension.cc

Index: extensions/common/extension.cc
diff --git a/extensions/common/extension.cc b/extensions/common/extension.cc
index 1e973fccc82b2e57b533dae0168271be8fa4a3b9..fecbe8e8e9b29f0abfdf3092eda7e8729f54e102 100644
--- a/extensions/common/extension.cc
+++ b/extensions/common/extension.cc
@@ -432,6 +432,26 @@ bool Extension::is_theme() const {
   return manifest()->is_theme();
 }
 
+// This is a short-term solution to grant camera and/or microphone access to
+// extensions:
+// 1. Virtual keyboard extension.
+// 2. Flutter gesture recognition extension.
+// 3. TODO(smus): Airbender experiment 1.
+// 4. TODO(smus): Airbender experiment 2.
+// 5. Hotwording component extension.
+// 6. XKB input method component extension.
+// 7. M17n/T13n/CJK input method component extension.
+// Once http://crbug.com/292856 is fixed, remove this whitelist.
+bool Extension::is_media_request_white_listed() const {
+  return id() == "mppnpdlheglhdfmldimlhpnegondlapf" ||
+         id() == "jokbpnebhdcladagohdnfgjcpejggllo" ||
+         id() == "clffjmdilanldobdnedchkdbofoimcgb" ||
+         id() == "nnckehldicaciogcbchegobnafnjkcne" ||
+         id() == "nbpagnldghgfoolbancepceaanlmhfmd" ||
+         id() == "jkghodnilhceideoidjikpgommlajknk" ||
+         id() == "gjaehgfemfahhmlgpdfknkhdnemmolop";
+}
+
 bool Extension::can_be_incognito_enabled() const {
   // Only component platform apps are supported in incognito.
   return !is_platform_app() || location() == Manifest::COMPONENT;