Chrome app manifest support for action handlers.

extensions/common/common_manifest_handlers.cc

Index: extensions/common/common_manifest_handlers.cc
diff --git a/extensions/common/common_manifest_handlers.cc b/extensions/common/common_manifest_handlers.cc
index 95293215947b248282790b67c3595f6dc9db91c9..34b549efc05e3adcabe3cab82d5afa77804d2981 100644
--- a/extensions/common/common_manifest_handlers.cc
+++ b/extensions/common/common_manifest_handlers.cc
@@ -9,6 +9,7 @@
 #include "extensions/common/api/printer_provider/usb_printer_manifest_handler.h"
 #include "extensions/common/api/sockets/sockets_manifest_handler.h"
 #include "extensions/common/manifest_handler.h"
+#include "extensions/common/manifest_handlers/action_handlers_handler.h"
 #include "extensions/common/manifest_handlers/background_info.h"
 #include "extensions/common/manifest_handlers/content_capabilities_handler.h"
 #include "extensions/common/manifest_handlers/csp_info.h"
@@ -32,6 +33,7 @@ namespace extensions {
 
 void RegisterCommonManifestHandlers() {
   DCHECK(!ManifestHandler::IsRegistrationFinalized());
+  (new ActionHandlersHandler)->Register();
   (new BackgroundManifestHandler)->Register();
   (new BluetoothManifestHandler)->Register();
   (new ContentCapabilitiesHandler)->Register();