Reapply "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 3ce365b96662065012a4b1ecf914430e50fa86dd..139aab3b8b45e1f526f8a0032e665860fe6e3920 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -4918,13 +4918,6 @@ 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;
@@ -4940,35 +4933,6 @@ 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;