Fix a bug where we would emit:

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

Index: sdk/lib/_internal/compiler/implementation/ssa/codegen.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/ssa/codegen.dart	(revision 23244)
+++ sdk/lib/_internal/compiler/implementation/ssa/codegen.dart	(working copy)
@@ -2047,10 +2047,14 @@
 
   void visitStaticStore(HStaticStore node) {
     world.registerStaticUse(node.element);
-    js.VariableUse variableUse =
-        new js.VariableUse(backend.namer.isolateAccess(node.element));
+    js.VariableUse isolate = new js.VariableUse(backend.namer.CURRENT_ISOLATE);
+    // Create a property access to make sure expressions and variable
+    // declarations recognizers don't see this assignment as a local
+    // assignment.
+    js.Node variable = new js.PropertyAccess.field(
+        isolate, backend.namer.getName(node.element));
     use(node.inputs[0]);
-    push(new js.Assignment(variableUse, pop()), node);
+    push(new js.Assignment(variable, pop()), node);
   }
 
   void visitStringConcat(HStringConcat node) {