| "flat_key","key","int_value","string_value" |
| "chrome_histogram_sample.name","chrome_histogram_sample.name","[NULL]","Compositing.Display.DrawToSwapUs" |
| "chrome_histogram_sample.name","chrome_histogram_sample.name","[NULL]","CompositorLatency.TotalLatency" |
| "chrome_histogram_sample.name","chrome_histogram_sample.name","[NULL]","Graphics.Smoothness.Checkerboarding.MainThreadAnimation" |
| "chrome_histogram_sample.name","chrome_histogram_sample.name","[NULL]","Memory.GPU.PeakMemoryUsage.PageLoad" |
| "chrome_histogram_sample.name_hash","chrome_histogram_sample.name_hash",10,"[NULL]" |
| "chrome_histogram_sample.name_hash","chrome_histogram_sample.name_hash",20,"[NULL]" |
| "chrome_histogram_sample.name_hash","chrome_histogram_sample.name_hash",30,"[NULL]" |
| "chrome_histogram_sample.name_hash","chrome_histogram_sample.name_hash",40,"[NULL]" |
| "chrome_histogram_sample.name_hash","chrome_histogram_sample.name_hash",50,"[NULL]" |
| "chrome_histogram_sample.name_hash","chrome_histogram_sample.name_hash",60,"[NULL]" |
| "chrome_histogram_sample.name_iid","chrome_histogram_sample.name_iid",1,"[NULL]" |
| "chrome_histogram_sample.name_iid","chrome_histogram_sample.name_iid",2,"[NULL]" |
| "chrome_histogram_sample.name_iid","chrome_histogram_sample.name_iid",3,"[NULL]" |
| "chrome_histogram_sample.name_iid","chrome_histogram_sample.name_iid",4,"[NULL]" |
| "chrome_histogram_sample.sample","chrome_histogram_sample.sample",100,"[NULL]" |
| "chrome_histogram_sample.sample","chrome_histogram_sample.sample",200,"[NULL]" |
| "chrome_histogram_sample.sample","chrome_histogram_sample.sample",300,"[NULL]" |
| "chrome_histogram_sample.sample","chrome_histogram_sample.sample",400,"[NULL]" |
| "chrome_histogram_sample.sample","chrome_histogram_sample.sample",500,"[NULL]" |
| "chrome_histogram_sample.sample","chrome_histogram_sample.sample",600,"[NULL]" |
| "event.category","event.category","[NULL]","disabled-by-default-histogram_samples" |
| "event.name","event.name","[NULL]","[NULL]" |
| "is_root_in_scope","is_root_in_scope",1,"[NULL]" |
| "source","source","[NULL]","descriptor" |
| "source_id","source_id",0,"[NULL]" |
