Pass through context information in error messages

test/codegen/expect/server_mode/html_input.html

Index: test/codegen/expect/server_mode/html_input.html
diff --git a/test/codegen/expect/server_mode/html_input.html b/test/codegen/expect/server_mode/html_input.html
index c6b3a3fffd258aecf77775c887eb9636b8a39ff2..31fc179aec8b1062d80db5d1baf683ede39aa59f 100644
--- a/test/codegen/expect/server_mode/html_input.html
+++ b/test/codegen/expect/server_mode/html_input.html
@@ -3,7 +3,7 @@
 <script src="cached/4615119c209e4a6985a41cff7647d1c5/dev_compiler/runtime/dart_runtime.js"></script>
 <script src="cached/5ffe2b672ea94c7fe06e7b188f7dac10/dev_compiler/runtime/dart/core.js"></script>
 <script src="cached/b846e240bec12226bbe7dcccfdd3fdf6/dev_compiler/runtime/dart/math.js"></script>
-<script src="cached/fa4d5796ad409e1bbdbd3c64354488c4/dev_compiler/runtime/messages_widget.js"></script>
+<script src="cached/2ece0c740cf6171a9f2f43ce88f55c6b/dev_compiler/runtime/messages_widget.js"></script>
 <link rel="stylesheet" href="cached/307a7ef1e0cd0544d55c6f768f5e3886/dev_compiler/runtime/messages.css">
 <script src="cached/e0fe26da0f62b92461fd9b150facff7e/dir/html_input_d.js"></script>
 <script src="cached/fa9de9a33d7351e5d3e8cc73cf72dc6c/dir/html_input_b.js"></script>