Merge commit '6583d4f1'

Commands:
git remote add llvm https://git.llvm.org/git/llvm.git
git subtree pull --prefix third_party/llvm-7.0/llvm llvm release_70 --squash

Bug b/123026156
Bug chromium:922089

Change-Id: If2de3cbde48d6acf02db68844bd16317869bf548