Source positions for constructors and lots of async machinery

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 7ca52de4f86dad27731e02c306db6522f34cad76..8c164fcdbd3d0d6e1affa61abf269cce71f4a725 100644
--- a/runtime/vm/intermediate_language_x64.cc
+++ b/runtime/vm/intermediate_language_x64.cc
@@ -1685,7 +1685,7 @@ class BoxAllocationSlowPath : public SlowPathCode {
     locs->live_registers()->Remove(Location::RegisterLocation(result_));
 
     compiler->SaveLiveRegisters(locs);
-    compiler->GenerateCall(Scanner::kNoSourcePos,  // No token position.
+    compiler->GenerateCall(Token::kNoSourcePos,  // No token position.
                            stub_entry,
                            RawPcDescriptors::kOther,
                            locs);
@@ -6192,7 +6192,7 @@ void GotoInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
     // may be inserted before this instruction.
     compiler->AddCurrentDescriptor(RawPcDescriptors::kDeopt,
                                    GetDeoptId(),
-                                   Scanner::kNoSourcePos);
+                                   Token::kNoSourcePos);
   }
   if (HasParallelMove()) {
     compiler->parallel_move_resolver()->EmitNativeCode(parallel_move());
@@ -6444,7 +6444,7 @@ void GrowRegExpStackInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
   const Register result = locs()->out(0).reg();
   __ PushObject(Object::null_object());
   __ pushq(typed_data);
-  compiler->GenerateRuntimeCall(Scanner::kNoSourcePos,  // No token position.
+  compiler->GenerateRuntimeCall(Token::kNoSourcePos,  // No token position.
                                 deopt_id(),
                                 kGrowRegExpStackRuntimeEntry,
                                 1,