[turbofan] remove dependence of InstructionBlock on BasicBlock

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 14de00fd60147448a2e4ddaedd0e605b625b32e0..80b19809d338eece87ad6280c1e026e183857df0 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -746,7 +746,7 @@ struct JumpThreadingPhase {
   static const char* phase_name() { return "jump threading"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    ZoneVector<BasicBlock::RpoNumber> result(temp_zone);
+    ZoneVector<RpoNumber> result(temp_zone);
     if (JumpThreading::ComputeForwarding(temp_zone, result, data->sequence())) {
       JumpThreading::ApplyForwarding(result, data->sequence());
     }