Add Chromium Canary target

The mv3 variant will be used for this target, to start testing it.

Bug: translateselectedtext:10
Change-Id: I0bc5d715d03b2ef9a7514e107d56c66703f05060
diff --git a/Makefile b/Makefile
index ec00ad4..3ae08af 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: node_deps clean_dist deps clean_deps serve_chromium serve_chromium_mv3 serve_edge serve_edge_mv3 release release_chromium_stable release_chromium_beta release_edge build_test_extension clean_releases clean
+.PHONY: node_deps clean_dist deps clean_deps serve_chromium serve_chromium_mv3 serve_edge serve_edge_mv3 release release_chromium_stable release_chromium_beta release_chromium_canary release_edge build_test_extension clean_releases clean
 
 .DEFAULT_GOAL := release
 WEBPACK := ./node_modules/webpack-cli/bin/cli.js
@@ -41,6 +41,11 @@
 	$(RELEASE_SCRIPT) -c beta -b chromium -f
 	rm -rf dist/chromium
 
+release_chromium_canary: deps
+	$(WEBPACK) --mode production --env browser_target=chromium_mv3 --env canary
+	$(RELEASE_SCRIPT) -c canary -b chromium_mv3 -f
+	rm -rf dist/chromium_mv3
+
 release_edge: deps
 	$(WEBPACK) --mode production --env browser_target=edge
 	$(RELEASE_SCRIPT) -c stable -b edge -f