Rename $builtinType to $ti

pkg/compiler/lib/src/ssa/codegen.dart

Index: pkg/compiler/lib/src/ssa/codegen.dart
diff --git a/pkg/compiler/lib/src/ssa/codegen.dart b/pkg/compiler/lib/src/ssa/codegen.dart
index c23534849e2db61af309843f148fede61c7b15c5..0d6376ecd83102490e74afed5f99d485b0b4c269 100644
--- a/pkg/compiler/lib/src/ssa/codegen.dart
+++ b/pkg/compiler/lib/src/ssa/codegen.dart
@@ -2858,7 +2858,7 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
   void visitTypeInfoReadRaw(HTypeInfoReadRaw node) {
     use(node.inputs[0]);
     js.Expression receiver = pop();
-    push(js.js(r'#.$builtinTypeInfo', receiver));
+    push(js.js(r'#.#', [receiver, backend.namer.rtiFieldName]));
   }
 
   void visitTypeInfoReadVariable(HTypeInfoReadVariable node) {
@@ -2937,8 +2937,15 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
         js.Expression receiver = pop();
         js.Expression helper =
             backend.emitter.staticFunctionAccess(helperElement);
-        push(js.js(r'#(#.$builtinTypeInfo && #.$builtinTypeInfo[#])',
-            [helper, receiver, receiver, js.js.number(index)]));
+        js.Expression rtiFieldName = backend.namer.rtiFieldName;
+        push(js.js(r'#(#.# && #.#[#])', [
+          helper,
+          receiver,
+          rtiFieldName,
+          receiver,
+          rtiFieldName,
+          js.js.number(index)
+        ]));
       } else {
         backend.emitter.registerReadTypeVariable(element);
         push(js.js(