Update dartium deps to include html

tools/deps/dartium.deps/DEPS

Index: tools/deps/dartium.deps/DEPS
diff --git a/tools/deps/dartium.deps/DEPS b/tools/deps/dartium.deps/DEPS
index 10d4cd4b9b67875de5b5a9a6c1a301ad88147689..e6d49627219d4b99f867c422e1010f225aa75e6d 100644
--- a/tools/deps/dartium.deps/DEPS
+++ b/tools/deps/dartium.deps/DEPS
@@ -21,6 +21,7 @@ vars.update({
   "collection_rev": "@1da9a07f32efa2ba0c391b289e2037391e31da0e",
   "crypto_rev" : "@2df57a1e26dd88e8d0614207d4b062c73209917d",
   "glob_rev": "@704cf75e4f26b417505c5c611bdaacd8808467dd",
+  "html_tag" : "@0.12.1+1",
   "http_rev" : "@9b93e1542c753090c50b46ef1592d44bc858bfe7",
   "http_multi_server_tag" : "@1.3.2",
   "http_parser_rev" : "@8b179e36aba985208e4c5fb15cfddd386b6370a4",
@@ -92,6 +93,8 @@ deps.update({
       "https://github.com/dart-lang/collection.git" + Var("collection_rev"),
   "src/dart/third_party/pkg/glob":
       "https://github.com/dart-lang/glob.git" + Var("glob_rev"),
+  Var("dart_root") + "/third_party/pkg/html":
+      (Var("github_mirror") % "html") + Var("html_tag"),

[vsm, 2015/06/13 17:20:27]

I don't think dart_root or github_mirror are defined here.   I'd follow the
pattern of the other pkgs here and just expand it out.

[Brian Wilkerson, 2015/06/15 15:01:58]

Done

   "src/dart/third_party/pkg/json_rpc_2":
       "https://github.com/dart-lang/json_rpc_2.git" + Var("json_rpc_2_rev"),
   "src/dart/third_party/pkg/http":