What does ovly_debug_event do in chrome?
Note the massive offsets, such as 0x16574 into this function. It appears you don't have private symbols for chrome.dll, so the debugger is finding the closest (well, closest previous) publically exported symbol.
In other words, you aren't in _ovly_debug_event. You're in a function that was laid out after it in the executable, but that isn't publically exported.
To try to resolve this, if you want to see what's actually happening, you can addhttp://chromium-browser-symsrv.commondatastorage.googleapis.comto your symbol path. In windbg, the command would be
.sympath+ SRV*C:\tmp*http://chromium-browser-symsrv.commondatastorage.googleapis.com
Additionally, that function is actually a helper function for GDB to aid debugging overlays. See https://sourceware.org/gdb/onlinedocs/gdb/Automatic-Overlay-Debugging.html.