Run clang-tidy modernize-use-equals-{delete,default} on //tools

See the bugs and cxx post for justification and details:
https://groups.google.com/a/chromium.org/forum/#!topic/cxx/RkOHzIK6Tq8

This change was done using clang-tidy as described here:
https://chromium.googlesource.com/chromium/src/+/lkcr/docs/clang_tidy.md

In some cases the the tool leaves behind a string of commas where it
replaced a member initializer list
(https://bugs.llvm.org/show_bug.cgi?id=35051). They were cleaned up with:
  git diff --name-only | \
    xargs sed -E -i 's/(^\s*|\)\s*):[ ,]*= default/\1 = default/'

BUG=778959,778957

Change-Id: Ib8d800da04575b9485affad6249ccb4736fc5dbe
Reviewed-on: https://chromium-review.googlesource.com/789746
Reviewed-by: Scott Graham <scottmg@chromium.org>
Commit-Queue: Scott Graham <scottmg@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#519336}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: e4963ba3016a4961fda1fbab0516b35ebe1af3da
77 files changed
tree: 88e67f1099c03f157a0f8ec0e274d44fb47afcfa
  1. tools/