Show grids when holding shift while hovering paint events.

Author: hzr

src/profiler/profiler_view.js

@@ -436,12 +436,20 @@ var ProfilerView = function(id, name, container_class, html, default_handler)
       if (timeline_event.type === TYPE_PAINT)
       {
         var area = timeline_event.paint.area;
-        var config = {x: area.x, y: area.y, w: area.w, h: area.h};
+        var config = {
+          x: area.x,
+          y: area.y,
+          w: area.w,
+          h: area.h,
+          grid_color: event.shiftKey ? [255, 0, 0, 255] : null
+        };
+
         if (window.services["profiler"].satisfies_version(1, 1))
         {
           config.x += area.ox;
           config.y += area.oy;
         }
+
         this._overlay.create_overlay(null, config);
       }
     }