More PcDescriptor cleanups.

runtime/vm/stack_frame.cc

Index: runtime/vm/stack_frame.cc
===================================================================
--- runtime/vm/stack_frame.cc	(revision 38237)
+++ runtime/vm/stack_frame.cc	(working copy)
@@ -227,10 +227,9 @@
   PcDescriptors::Iterator iter(descriptors, RawPcDescriptors::kAnyKind);
   while (iter.HasNext()) {
     const RawPcDescriptors::PcDescriptorRec& rec = iter.Next();
-    if ((rec.pc == pc()) && (rec.try_index != -1)) {
-      const intptr_t try_index = rec.try_index;
+    if ((rec.pc() == pc()) && (rec.try_index() != -1)) {
       RawExceptionHandlers::HandlerInfo handler_info;
-      handlers.GetHandlerInfo(try_index, &handler_info);
+      handlers.GetHandlerInfo(rec.try_index(), &handler_info);
       *handler_pc = handler_info.handler_pc;
       *needs_stacktrace = handler_info.needs_stacktrace;
       *has_catch_all = handler_info.has_catch_all;
@@ -252,8 +251,8 @@
   PcDescriptors::Iterator iter(descriptors, RawPcDescriptors::kAnyKind);
   while (iter.HasNext()) {
     const RawPcDescriptors::PcDescriptorRec& rec = iter.Next();
-    if (rec.pc == pc()) {
-      return rec.token_pos;
+    if (rec.pc() == pc()) {
+      return rec.token_pos();
     }
   }
   return -1;