Support getting and deleting token for Instance ID.

google_apis/gcm/BUILD.gn

Index: google_apis/gcm/BUILD.gn
diff --git a/google_apis/gcm/BUILD.gn b/google_apis/gcm/BUILD.gn
index 83aa0672deccc985f668e18fa2c004f25a784fc0..ee6a42f13aeb72ed0a6936d5760fe42806fb8b93 100644
--- a/google_apis/gcm/BUILD.gn
+++ b/google_apis/gcm/BUILD.gn
@@ -7,6 +7,8 @@ import("//third_party/protobuf/proto_library.gni")
 
 component("gcm") {
   sources = [
+    "base/gcm_util.cc",
+    "base/gcm_util.h",
     "base/mcs_message.cc",
     "base/mcs_message.h",
     "base/mcs_util.cc",
@@ -25,18 +27,24 @@ component("gcm") {
     "engine/connection_handler.h",
     "engine/connection_handler_impl.cc",
     "engine/connection_handler_impl.h",
+    "engine/gcm_registration_request_handler.cc",
+    "engine/gcm_registration_request_handler.h",
     "engine/gcm_store.cc",
     "engine/gcm_store.h",
     "engine/gcm_store_impl.cc",
     "engine/gcm_store_impl.h",
+    "engine/gcm_unregistration_request_handler.cc",
+    "engine/gcm_unregistration_request_handler.h",
     "engine/gservices_settings.cc",
     "engine/gservices_settings.h",
     "engine/heartbeat_manager.cc",
     "engine/heartbeat_manager.h",
+    "engine/instance_id_delete_token_request_handler.cc",
+    "engine/instance_id_delete_token_request_handler.h",
+    "engine/instance_id_get_token_request_handler.cc",
+    "engine/instance_id_get_token_request_handler.h",
     "engine/mcs_client.cc",
     "engine/mcs_client.h",
-    "engine/registration_info.cc",
-    "engine/registration_info.h",
     "engine/registration_request.cc",
     "engine/registration_request.h",
     "engine/unregistration_request.cc",