DevTools: Fix breakpoints in source mapped files after reload.

LayoutTests/inspector/sources/debugger/breakpoint-manager.js

 var initialize_BreakpointManagerTest = function() {
 
 InspectorTest.uiSourceCodes = {};
 
 InspectorTest.dumpTargetIds = false;
 
 InspectorTest.initializeDefaultMappingOnTarget = function (target) {
     var defaultMapping = {
         rawLocationToUILocation: function(rawLocation)
         {
@@ skipping 128 matching lines @@
         }
 
         this._scheduleSetBeakpointCallback(callback, breakpointId, [WebInspector.DebuggerModel.Location.fromPayload(this._target, location)]);
     },
 
     removeBreakpoint: function(breakpointId, callback)
     {
         InspectorTest.addResult("    " + InspectorTest.dumpTarget(this) + "debuggerModel.removeBreakpoint(" + breakpointId + ")");
         delete this._breakpoints[breakpointId];
         if (callback)
-            callback();
+            setTimeout(callback, 0);
     },
 
     setBreakpointsActive: function() { },
 
     createLiveLocation: function(rawLocation, updateDelegate)
     {
         return this._scripts[rawLocation.scriptId].createLiveLocation(rawLocation, updateDelegate);
     },
 
     scriptForId: function(scriptId)
@@ skipping 163 matching lines @@
     {
         InspectorTest.dumpBreakpointLocations(breakpointManager);
         next();
     }
 
     InspectorTest.dumpBreakpointLocations(breakpointManager);
     InspectorTest.resetBreakpointManager(breakpointManager, finish);
 }
 
 }