Remove RestartFrame from live edit API

src/liveedit-debugger.js

 // 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.
 
 // LiveEdit feature implementation. The script should be executed after
 // debug-debugger.js.
 
 // A LiveEdit namespace. It contains functions that modifies JavaScript code
 // according to changes of script source (if possible).
 //
 // When new script source is put in, the difference is calculated textually,
 // in form of list of delete/add/change chunks. The functions that include
 // change chunk(s) get recompiled, or their enclosing functions are
 // recompiled instead.
 // If the function may not be recompiled (e.g. it was completely erased in new
 // version of the script) it remains unchanged, but the code that could
 // create a new instance of this function goes away. An old version of script
 // is created to back up this obsolete function.
 // All unchanged functions have their positions updated accordingly.
 //
 // LiveEdit namespace is declared inside a single function constructor.
 
 "use strict";
 
 Debug.LiveEdit = new function() {
 
   // Forward declaration for minifier.
   var FunctionStatus;
 
-  var NEEDS_STEP_IN_PROPERTY_NAME = "stack_update_needs_step_in";
-
   // Applies the change to the script.
   // The change is in form of list of chunks encoded in a single array as
   // a series of triplets (pos1_start, pos1_end, pos2_end)
   function ApplyPatchMultiChunk(script, diff_array, new_source, preview_only,
       change_log) {
 
     var old_source = script.source;
 
     // Gather compile information about old version of script.
     var old_compile_info = GatherCompileInfo(old_source, script);
@@ skipping 100 matching lines @@
       }
     }
 
     // We haven't changed anything before this line yet.
     // Committing all changes.
 
     // Check that function being patched is not currently on stack or drop them.
     var dropped_functions_number =
         CheckStackActivations(replaced_function_infos, change_log);
 
+    // Our current implementation requires client to manually issue "step in"
+    // command for correct stack state if the stack was modified.
     preview_description.stack_modified = dropped_functions_number != 0;
 
-    // Our current implementation requires client to manually issue "step in"
-    // command for correct stack state.
-    preview_description[NEEDS_STEP_IN_PROPERTY_NAME] =
-        preview_description.stack_modified;
-
     // Start with breakpoints. Convert their line/column positions and
     // temporary remove.
     var break_points_restorer = TemporaryRemoveBreakPoints(script, change_log);
 
     var old_script;
 
     // Create an old script only if there are function that should be linked
     // to old version.
     if (link_to_old_script_list.length == 0) {
       %LiveEditReplaceScript(script, new_source, null);
@@ skipping 927 matching lines @@
     function DescribePositions(node) {
       return {
         start_position: node.info.start_position,
         end_position: node.info.end_position
       };
     }
 
     return ProcessOldNode(old_code_tree);
   }
 
-  // Restarts call frame and returns value similar to what LiveEdit returns.
-  function RestartFrame(frame_mirror) {
-    var result = frame_mirror.restart();
-    if (IS_STRING(result)) {
-      throw new Failure("Failed to restart frame: " + result);
-    }
-    var result = {};
-    result[NEEDS_STEP_IN_PROPERTY_NAME] = true;
-    return result;
-  }
-  // Function is public.
-  this.RestartFrame = RestartFrame;
-
   // Functions are public for tests.
   this.TestApi = {
     PosTranslator: PosTranslator,
     CompareStrings: CompareStrings,
     ApplySingleChunkPatch: ApplySingleChunkPatch
   };
 };