Revert "Move precompilation-related flags to flags list."

runtime/vm/debugger.cc

Index: runtime/vm/debugger.cc
diff --git a/runtime/vm/debugger.cc b/runtime/vm/debugger.cc
index efe12b771541578cf4044da6b25c5de020c3faad..06e788026781b828c52f60a0e7291ebd62a41adf 100644
--- a/runtime/vm/debugger.cc
+++ b/runtime/vm/debugger.cc
@@ -46,6 +46,7 @@ DEFINE_FLAG(bool, steal_breakpoints, false,
 
 DECLARE_FLAG(bool, trace_isolates);
 DECLARE_FLAG(bool, warn_on_pause_with_no_debugger);
+DECLARE_FLAG(bool, precompilation);
 
 
 #ifndef PRODUCT
@@ -1517,7 +1518,7 @@ DebuggerStackTrace* Debugger::CollectStackTrace() {
     }
     if (frame->IsDartFrame()) {
       code = frame->LookupDartCode();
-      if (code.is_optimized() && !FLAG_precompiled_mode) {
+      if (code.is_optimized() && !FLAG_precompilation) {
         deopt_frame = DeoptimizeToArray(thread, frame, code);
         for (InlinedFunctionsIterator it(code, frame->pc());
              !it.Done();