Revert "Lazy deopt without code patching."

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 139aab3b8b45e1f526f8a0032e665860fe6e3920..3ce365b96662065012a4b1ecf914430e50fa86dd 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -4918,6 +4918,13 @@ class Code : public Object {
   }
   TokenPosition GetTokenIndexOfPC(uword pc) const;
 
+  enum {
+    kInvalidPc = -1
+  };
+
+  uword GetLazyDeoptReturnPc() const;
+  uword GetLazyDeoptThrowPc() const;
+
   // Find pc, return 0 if not found.
   uword GetPcForDeoptId(intptr_t deopt_id, RawPcDescriptors::Kind kind) const;
   intptr_t GetDeoptIdForOsr(uword pc) const;
@@ -4933,6 +4940,35 @@ class Code : public Object {
 #endif
   }
 
+  intptr_t lazy_deopt_return_pc_offset() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return 0;
+#else
+    return raw_ptr()->lazy_deopt_return_pc_offset_;
+#endif
+  }
+  void set_lazy_deopt_return_pc_offset(intptr_t pc) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
+    StoreNonPointer(&raw_ptr()->lazy_deopt_return_pc_offset_, pc);
+#endif
+  }
+  intptr_t lazy_deopt_throw_pc_offset() const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    return 0;
+#else
+    return raw_ptr()->lazy_deopt_throw_pc_offset_;
+#endif
+  }
+  void set_lazy_deopt_throw_pc_offset(intptr_t pc) const {
+#if defined(DART_PRECOMPILED_RUNTIME)
+    UNREACHABLE();
+#else
+    StoreNonPointer(&raw_ptr()->lazy_deopt_throw_pc_offset_, pc);
+#endif
+  }
+
   bool IsAllocationStubCode() const;
   bool IsStubCode() const;
   bool IsFunctionCode() const;