VM: Replace StoreVMField with StoreInstanceField.

runtime/vm/flow_graph_inliner.cc

Index: runtime/vm/flow_graph_inliner.cc
===================================================================
--- runtime/vm/flow_graph_inliner.cc	(revision 33058)
+++ runtime/vm/flow_graph_inliner.cc	(working copy)
@@ -675,15 +675,18 @@
       // TODO(fschneider): Avoid setting the context, if not needed.
       Definition* closure =
           closure_call->PushArgumentAt(0)->value()->definition();
-      LoadFieldInstr* context =
-          new LoadFieldInstr(new Value(closure),
-                             Closure::context_offset(),
-                             Type::ZoneHandle());
       AllocateObjectInstr* alloc =
           closure_call->ArgumentAt(0)->AsAllocateObject();
+      Definition* context = NULL;
       if ((alloc != NULL) && !alloc->closure_function().IsNull()) {
         ASSERT(!alloc->context_field().IsNull());
-        context->set_field(&alloc->context_field());
+        context = new LoadFieldInstr(new Value(closure),
+                                     &alloc->context_field(),
+                                     Type::ZoneHandle());
+      } else {
+        context = new LoadFieldInstr(new Value(closure),
+                                     Closure::context_offset(),
+                                     Type::ZoneHandle());
       }
 
       context->set_ssa_temp_index(caller_graph()->alloc_ssa_temp_index());