[liveedit] reimplement frame restarting.

src/globals.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 1256 matching lines @@
     kSignedSmall = 0x01,
     kNumber = 0x3,
     kNumberOrOddball = 0x7,
     kInternalizedString = 0x8,
     kString = 0x18,
     kReceiver = 0x20,
     kAny = 0x7F
   };
 };
 
-// Describes how exactly a frame has been dropped from stack.
-enum LiveEditFrameDropMode {
-  // No frame has been dropped.
-  LIVE_EDIT_FRAMES_UNTOUCHED,
-  // The top JS frame had been calling debug break slot stub. Patch the
-  // address this stub jumps to in the end.
-  LIVE_EDIT_FRAME_DROPPED_IN_DEBUG_SLOT_CALL,
-  // The top JS frame had been calling some C++ function. The return address
-  // gets patched automatically.
-  LIVE_EDIT_FRAME_DROPPED_IN_DIRECT_CALL,
-  LIVE_EDIT_FRAME_DROPPED_IN_RETURN_CALL,
-  LIVE_EDIT_CURRENTLY_SET_MODE
-};
-
 enum class UnicodeEncoding : uint8_t {
   // Different unicode encodings in a |word32|:
   UTF16,  // hi 16bits -> trailing surrogate or 0, low 16bits -> lead surrogate
   UTF32,  // full UTF32 code unit / Unicode codepoint
 };
 
 inline size_t hash_value(UnicodeEncoding encoding) {
   return static_cast<uint8_t>(encoding);
 }
 
@@ skipping 37 matching lines @@
 }  // namespace internal
 }  // namespace v8
 
 // Used by js-builtin-reducer to identify whether ReduceArrayIterator() is
 // reducing a JSArray method, or a JSTypedArray method.
 enum class ArrayIteratorKind { kArray, kTypedArray };
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_