Move precompilation-related flags to flags list.

runtime/vm/intermediate_language_x64.cc

Index: runtime/vm/intermediate_language_x64.cc
diff --git a/runtime/vm/intermediate_language_x64.cc b/runtime/vm/intermediate_language_x64.cc
index 2fdf93eabb7a6ac813c1538b97eb1f5753291d7d..35d73a2053bf6108a51b5449269f2d4fa6c90a9a 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -23,12 +23,6 @@
 
 namespace dart {
 
-DECLARE_FLAG(bool, allow_absolute_addresses);
-DECLARE_FLAG(bool, emit_edge_counters);
-DECLARE_FLAG(int, optimization_counter_threshold);
-DECLARE_FLAG(bool, use_osr);
-DECLARE_FLAG(bool, precompilation);
-
 // Generic summary for call instructions that have all arguments pushed
 // on the stack and return the result in a fixed register RAX.
 LocationSummary* Instruction::MakeCallSummary(Zone* zone) {
@@ -2121,7 +2115,7 @@ void CreateArrayInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
 
   Label slow_path, done;
   if (compiler->is_optimizing() &&
-      !FLAG_precompilation &&
+      !FLAG_precompiled_mode &&
       num_elements()->BindsToConstant() &&
       num_elements()->BoundConstant().IsSmi()) {
     const intptr_t length = Smi::Cast(num_elements()->BoundConstant()).Value();