Switch to using SourceLocation universally in service protocol.

runtime/observatory/lib/src/elements/script_inset.html

Index: runtime/observatory/lib/src/elements/script_inset.html
diff --git a/runtime/observatory/lib/src/elements/script_inset.html b/runtime/observatory/lib/src/elements/script_inset.html
index 7fdbcbf66a4c1131b596132f3b4ac5aceb92e87a..30b20d8c21f37fa3241f5386da64dacba8d6d2b7 100644
--- a/runtime/observatory/lib/src/elements/script_inset.html
+++ b/runtime/observatory/lib/src/elements/script_inset.html
@@ -79,4 +79,20 @@
   </template>
 </polymer-element>
 
+
+<polymer-element name="source-inset">
+<template>
+  <template if="{{ location != null }}">
+    <script-inset script="{{ location.script }}"
+                  startPos="{{ location.tokenPos }}"
+                  endPos="{{ location.endTokenPos }}"
+                  height="{{ height }}"
+                  currentPos="{{ currentPos }}"
+                  inDebuggerContext="{{ inDebuggerContext }}"
+                  variables="{{ variables }}">
+    </script-inset>
+  </template>
+</template>
+</polymer-element>
+
 <script type="application/dart" src="script_inset.dart"></script>