Store SharedFunctionInfos of a Script in a FixedArray indexed by their ID

src/debug/liveedit.js

Index: src/debug/liveedit.js
diff --git a/src/debug/liveedit.js b/src/debug/liveedit.js
index e9ee8092a269900dab3a505f8e793579dcbbca6b..4e2420e9064b089f8f6868a8beafeccf2e1d09eb 100644
--- a/src/debug/liveedit.js
+++ b/src/debug/liveedit.js
@@ -30,6 +30,7 @@
   var GetScriptBreakPoints;
   var GlobalArray = global.Array;
   var MathFloor = global.Math.floor;
+  var MathMax = global.Math.max;
   var SyntaxError = global.SyntaxError;
 
   utils.Import(function(from) {
@@ -80,6 +81,10 @@
       }
       throw failure;
     }
+
+    var max_function_literal_id =
+        MathMax.apply(null, new_compile_info.map(i => i.function_literal_id));

[jochen (gone - plz use gerrit), 2016/12/01 10:30:56]

https://bugs.chromium.org/p/v8/issues/detail?id=5703 for why I'm not using the
spread operator here

+
     var root_new_node = BuildCodeInfoTree(new_compile_info);
 
     // Link recompiled script data with other data.
@@ -179,15 +184,15 @@
     // 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);
+      %LiveEditReplaceScript(script, max_function_literal_id, new_source, null);
       old_script = UNDEFINED;
     } else {
       var old_script_name = CreateNameForOldScript(script);
 
       // Update the script text and create a new script representing an old
       // version of the script.
-      old_script = %LiveEditReplaceScript(script, new_source,
-          old_script_name);
+      old_script = %LiveEditReplaceScript(script, max_function_literal_id,
+          new_source, old_script_name);
 
       var link_to_old_script_report = new GlobalArray();
       change_log.push( { linked_to_old_script: link_to_old_script_report } );
@@ -845,6 +850,7 @@
     this.scope_info = raw_array[4];
     this.outer_index = raw_array[5];
     this.shared_function_info = raw_array[6];
+    this.function_literal_id = raw_array[8];
     this.next_sibling_index = null;
     this.raw_array = raw_array;
   }