Record a correct deoptimization environment for slow-path code.

runtime/vm/flow_graph_compiler.h

Index: runtime/vm/flow_graph_compiler.h
diff --git a/runtime/vm/flow_graph_compiler.h b/runtime/vm/flow_graph_compiler.h
index 00f31ec8408fc4a47d620917e5275a838be38740..18c902874a805d0c2c06e8d4021d3c97214f8e15 100644
--- a/runtime/vm/flow_graph_compiler.h
+++ b/runtime/vm/flow_graph_compiler.h
@@ -285,7 +285,7 @@ class FlowGraphCompiler : public ValueObject {
 
   void TryIntrinsify();
 
-  void GenerateCallRuntime(intptr_t token_pos,
+  void GenerateRuntimeCall(intptr_t token_pos,
                            intptr_t deopt_id,
                            const RuntimeEntry& entry,
                            intptr_t argument_count,
@@ -434,6 +434,8 @@ class FlowGraphCompiler : public ValueObject {
   void SaveLiveRegisters(LocationSummary* locs);
   void RestoreLiveRegisters(LocationSummary* locs);
 
+  Environment* SlowPathEnvironmentFor(Instruction* instruction);
+
   // Returns true if the compiled function has a finally clause.
   bool HasFinally() const;