Reorganize module loading.

We now use webpack instead of SystemJS, effectively bundling modules
into one file (plus commons chunks) for every entry point.  This results
in a much smaller extension size (almost half).  Furthermore we use
yarn/npm even for extension run-time dependencies.  This relieves us
from manually vendoring and building dependencies.  It's also easier to
understand for new developers familiar with node.

1 files changed, 10 insertions, 4 deletions

diff --git a/node_modules/babel-traverse/lib/path/replacement.js b/node_modules/babel-traverse/lib/path/replacement.js
index dc852334d..a60c73d54 100644
--- a/node_modules/babel-traverse/lib/path/replacement.js
+++ b/node_modules/babel-traverse/lib/path/replacement.js
@@ -230,10 +230,16 @@ function replaceExpressionWithStatements(nodes) {
         return path.isLoop();
       });
       if (loop) {
-        var callee = this.get("callee");
-
-        var uid = callee.scope.generateDeclaredUidIdentifier("ret");
-        callee.get("body").pushContainer("body", t.returnStatement(uid));
+        var uid = loop.getData("expressionReplacementReturnUid");
+
+        if (!uid) {
+          var callee = this.get("callee");
+          uid = callee.scope.generateDeclaredUidIdentifier("ret");
+          callee.get("body").pushContainer("body", t.returnStatement(uid));
+          loop.setData("expressionReplacementReturnUid", uid);
+        } else {
+          uid = t.identifier(uid.name);
+        }
 
         path.get("expression").replaceWith(t.assignmentExpression("=", uid, path.node.expression));
       } else {