Add basic chromium recipe

infra/config/recipes.cfg

Index: infra/config/recipes.cfg
diff --git a/infra/config/recipes.cfg b/infra/config/recipes.cfg
index 483d5642f011dc737934fbf77fef16743f9cff1e..f3a4e8bef6649d31e28b91e109dea33756cd8dec 100644
--- a/infra/config/recipes.cfg
+++ b/infra/config/recipes.cfg
@@ -2,14 +2,20 @@ api_version: 1
 project_id: "chromium"
 recipes_path: "infra"
 deps {
+  project_id: "build"
+  url: "https://chromium.googlesource.com/chromium/tools/build.git"
+  branch: "master"
+  revision: "18266e6ec0d831d58f3c158bb0cf483c36ddb9dd"
+}
+deps {
   project_id: "depot_tools"
   url: "https://chromium.googlesource.com/chromium/tools/depot_tools.git"
   branch: "master"
-  revision: "dbb6f8246b47bbf47848618d7ae089f9233d0171"
+  revision: "6a33f2528314b17e7f7643e6fe6401ddd29de205"
 }
 deps {
   project_id: "recipe_engine"
   url: "https://chromium.googlesource.com/external/github.com/luci/recipes-py.git"
   branch: "master"
-  revision: "44b384f9b4f1085e9cfe43ea6308735a3af8d4e5"
+  revision: "1f4e7683113215117af63084dfef12ef06ac2896"
 }