gn args out/profile
  use_goma = true
  enable_nacl = false
  is_debug = false
  is_component_build = true
  enable_profiling = true
  enable_callgrind = true

ninja -C out/profile -j500 -l20 chrome && out/profile/chrome --enable-gpu-rasterization --enable-oop-rasterization --enable-profiling --profiling-at-start=gpu-process --no-sandbox --profiling-flush "http://browserbench.org/MotionMark/developer.html?suite-name=Animometer&test-name=Multiply&complexity=1000&test-interval=900&display=minimal&tiles=big&controller=fixed&frame-rate=50&kalman-process-error=1&kalman-measurement-error=4&time-measurement=performance"

I get a profile that looks like the attached.  Renderer process profiles look normal.  This has worked for me in the past.
 

Deleted: profile002.png 20.9 KB

	profile002.png 20.9 KB View Download