Chrome Version: 65.0.3311.0 e475c8f306fab051ba9e7bcba48479691ee6b9b3-refs/heads/master@{#526879} 32/64 bit
OS:Mac(10.12.6,10.13.2),win(7,8.1,10),Linux(14.04 LTS)

Steps to reproduce:
1. Launch chrome, navigate to NTP and open devtools.
2. Now go to 'Performance' section and record some activity for 4-5 times.
3. Now dock window to bottom and click on ‘recording’ drop down and observe.
 
Actual Result: Drop down list is not seen properly in performance section of devtools.
Expected Result: Drop down list should be  seen properly in performance section of devtools.

This is a non-regression issue, seen from M-65 series from build # 65.0.3292.0
 

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