Change google3 sync scripts to sync latest rather than LKGR.

tools/git_clone_to_google3.sh

 #!/bin/bash
 # Copyright 2014 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Crude script to clone the git skia repo into the current directory, which
 # must be a CitC client.
 #
 # Usage:
 #      ./tools/git_clone_to_google3.sh
 
 prodcertstatus -q || (echo "Please run prodaccess." 1>&2; exit 1)
 source gbash.sh || exit 2
 
-DEFINE_string skia_rev "" "Git hash of Skia revision to clone, default LKGR."
+DEFINE_string skia_rev "" "Git hash of Skia revision to clone, default latest."
 gbash::init_google "$@"
 
 set -e
 
-# Checkout LKGR of Skia in a temp location.
+# Checkout specified revision of Skia in a temp location.
 TMP=$(gbash::make_temp_dir)
 pushd "${TMP}"
 git clone https://skia.googlesource.com/skia
 cd skia
 git fetch
-if [ -z "${FLAGS_skia_rev}" ]; then
+if [[ -z "${FLAGS_skia_rev}" ]]; then
+  # Retrieve latest revision.
+  FLAGS_skia_rev="$(git show --format=%H --no-patch origin/master)"
+elif [[ "${FLAGS_skia_rev}" =~ "[Ll][Kk][Gg][Rr]" ]]; then

[mtklein, 2015/12/10 18:09:07]

I agree so hard with this CL that we might consider just deleting this case.

[dogben, 2015/12/10 18:18:38]

Your wish is granted.

   # Retrieve last known good revision.
   MY_DIR="$(gbash::get_absolute_caller_dir)"
   FLAGS_skia_rev="$(${MY_DIR}/get_skia_lkgr.sh)"
 fi
 git checkout --detach "${FLAGS_skia_rev}"
 
 # Rsync to google3 location.
 popd
 # Use multichange client in case there are too many files for nomultichange. http://b/7292343
 g4 client --set_option multichange
@@ skipping 50 matching lines @@
 # will always change them to Unix line endings.
 git update-index --skip-worktree make.bat
 git update-index --skip-worktree make.py
 
 # Tell git to ignore files left out of the rsync (i.e. "deleted" files).
 git status --porcelain | \
   grep -e "^ D" | \
   cut -c 4- | \
   xargs git update-index --skip-worktree