GitLab

I found a setter of block_mixed_plugin_content is not called from anywhere so
removed the param as preparation of Loader's Onion Soup.

Bug: 860403
Change-Id: I2a47e70f7c551727d918888977548142214b1725
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1883349Reviewed-by: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Makoto Shimazu <shimazu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709818}