Bug 808786 - Add a pref to disable sorting the variables when adding them in the view, r=past

browser/app/profile/firefox.js

@@ -1054,6 +1054,7 @@ pref("devtools.debugger.ui.win-height", 400);
 pref("devtools.debugger.ui.stackframes-width", 200);
 pref("devtools.debugger.ui.variables-width", 300);
 pref("devtools.debugger.ui.panes-visible-on-startup", false);
+pref("devtools.debugger.ui.variables-sorting-enabled", true);
 pref("devtools.debugger.ui.variables-non-enum-visible", true);
 pref("devtools.debugger.ui.variables-searchbox-visible", false);
 

browser/devtools/debugger/debugger-controller.js

@@ -603,11 +603,14 @@ StackFrames.prototype = {
     if (!aVariables) {
       return;
     }
-    // Sort all of the variables before adding them.
-    let sortedVariableNames = Object.keys(aVariables).sort();
+    let variableNames = Object.keys(aVariables);
 
+    // Sort all of the variables before adding them if preferred.
+    if (Prefs.variablesSortingEnabled) {
+      variableNames.sort();
+    }
     // Add the sorted variables to the specified scope.
-    for (let name of sortedVariableNames) {
+    for (let name of variableNames) {
       let paramVar = aScope.addVar(name, aVariables[name]);
       let paramVal = aVariables[name].value;
       this._addExpander(paramVar, paramVal);
@@ -1300,6 +1303,7 @@ Prefs.map("Int", "windowHeight", "devtools.debugger.ui.win-height");
 Prefs.map("Int", "stackframesWidth", "devtools.debugger.ui.stackframes-width");
 Prefs.map("Int", "variablesWidth", "devtools.debugger.ui.variables-width");
 Prefs.map("Bool", "panesVisibleOnStartup", "devtools.debugger.ui.panes-visible-on-startup");
+Prefs.map("Bool", "variablesSortingEnabled", "devtools.debugger.ui.variables-sorting-enabled");
 Prefs.map("Bool", "variablesNonEnumVisible", "devtools.debugger.ui.variables-non-enum-visible");
 Prefs.map("Bool", "variablesSearchboxVisible", "devtools.debugger.ui.variables-searchbox-visible");
 Prefs.map("Char", "remoteHost", "devtools.debugger.remote-host");