UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36

Steps to reproduce the problem:
1. Have a large number of tabs open (IIRC I had around 140, with many in incognito mode and spread throughout several windows -- Chrome was using around 8–10 GB of RAM at that point)
2. Go to chrome://settings and click "Use Classic" (under Appearance/Themes)
3. Observe that Chrome is frozen: pressing ctrl-tab, ctrl-T etc. update the window title, but no content within any Chrome window updates. One CPU core is also being held at 100%.
4. Attempt to open a new tab via the Ubuntu launcher
5. Crash Chrome

What is the expected behavior?
I would expect theme changes to be unaffected by how many Chrome tabs I have open.

What went wrong?
Changing theme when there are many tabs open in many windows causes the browser to hang for several minutes, then crash (possibly as a result of another window being opened).

Crashed report ID: 

How much crashed? Whole browser

Is it a problem with a plugin? N/A 

Did this work before? N/A 

Chrome version: 59.0.3071.115  Channel: stable
OS Version: Ubuntu 16.04
Flash Version: 26.0.0.131

No crash report; my client_id is 8472748229411574932 (per https://sites.google.com/a/chromium.org/dev/for-testers/bug-reporting-guidelines/reporting-crash-bug)