Add a getter interceptor to the new interceptor scheme. Also cleanup the "this" that turns into a r…

sdk/lib/_internal/compiler/implementation/ssa/variable_allocator.dart

Index: sdk/lib/_internal/compiler/implementation/ssa/variable_allocator.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/ssa/variable_allocator.dart	(revision 14875)
+++ sdk/lib/_internal/compiler/implementation/ssa/variable_allocator.dart	(working copy)
@@ -516,19 +516,7 @@
       if (name != null) return addAllocatedName(instruction, name);
     }
 
-    if (instruction is HThis) {
-      name = "this";
-      if (instruction.sourceElement != null) {
-        Element cls = instruction.sourceElement.getEnclosingClass();
-        // Change the name of [:this:] in a method of a foreign class
-        // to use the first parameter of the method, which is the
-        // actual receiver.
-        JavaScriptBackend backend = compiler.backend;
-        if (backend.isInterceptorClass(cls)) {
-          name = "primitive";
-        }
-      }
-    } else if (instruction is HParameterValue
+    if (instruction is HParameterValue
         && instruction.sourceElement.enclosingElement.isNative()) {
       // The dom/html libraries have inline JS code that reference	
       // parameter names directly. Long-term such code will be rejected.
@@ -551,7 +539,7 @@
   }
 
   String addAllocatedName(HInstruction instruction, String name) {
-    if (instruction is HParameterValue && name != 'this') {
+    if (instruction is HParameterValue) {
       parameterNames[instruction.sourceElement] = name;
     }
     usedNames.add(name);
@@ -633,6 +621,7 @@
     // TODO(ngeoffray): locals/parameters are being generated at use site,
     // but we need a name for them. We should probably not make
     // them generate at use site to make things simpler.
+    if (instruction is HThis) return false;
     if (instruction is HLocalValue) return true;
     if (instruction.usedBy.isEmpty) return false;
     if (generateAtUseSite.contains(instruction)) return false;