Ensure that all goto instructions have deoptimization target.

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 f141fd18bc1e1d991133e9e4fe711fe6595153f2..c07172307af444900a709b18e4b0d7558b610355 100644
--- a/runtime/vm/flow_graph_compiler.h
+++ b/runtime/vm/flow_graph_compiler.h
@@ -81,11 +81,6 @@ class CompilerDeoptInfo : public ZoneAllocated {
   // No code needs to be generated.
   virtual void GenerateCode(FlowGraphCompiler* compiler, intptr_t stub_ix) {}
 
-  // Builds deopt-after continuation point.
-  virtual void BuildReturnAddress(DeoptInfoBuilder* builder,
-                                  const Function& function,
-                                  intptr_t slot_ix);
-
   intptr_t pc_offset() const { return pc_offset_; }
   void set_pc_offset(intptr_t offset) { pc_offset_ = offset; }
 
@@ -119,11 +114,6 @@ class CompilerDeoptInfoWithStub : public CompilerDeoptInfo {
   // Implementation is in architecture specific file.
   virtual void GenerateCode(FlowGraphCompiler* compiler, intptr_t stub_ix);
 
-  // Builds deopt-before continuation point.
-  virtual void BuildReturnAddress(DeoptInfoBuilder* builder,
-                                  const Function& function,
-                                  intptr_t slot_ix);
-
  private:
   Label entry_label_;