Import abseil-cpp to third_party

Renamed abseil modules to make them webrtc specific.
Restricted visibility of abseil modules to webrtc packages.

Bug: 171836454
Test: Builds

Change-Id: Icf24c7e3093a77dd9a26e7ec78bd531eb1ad3dec

third_party/abseil-cpp/ci/linux_clang-latest_libcxx_bazel.sh

@@ -0,0 +1,89 @@
+#!/bin/bash
+#
+# Copyright 2019 The Abseil Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script that can be invoked to test abseil-cpp in a hermetic environment
+# using a Docker image on Linux. You must have Docker installed to use this
+# script.
+
+set -euox pipefail
+
+if [ -z ${ABSEIL_ROOT:-} ]; then
+  ABSEIL_ROOT="$(realpath $(dirname ${0})/..)"
+fi
+
+if [ -z ${STD:-} ]; then
+  STD="c++11 c++14 c++17"
+fi
+
+if [ -z ${COMPILATION_MODE:-} ]; then
+  COMPILATION_MODE="fastbuild opt"
+fi
+
+if [ -z ${EXCEPTIONS_MODE:-} ]; then
+  EXCEPTIONS_MODE="-fno-exceptions -fexceptions"
+fi
+
+readonly DOCKER_CONTAINER="gcr.io/google.com/absl-177019/linux_clang-latest:20200102"
+
+# USE_BAZEL_CACHE=1 only works on Kokoro.
+# Without access to the credentials this won't work.
+if [ ${USE_BAZEL_CACHE:-0} -ne 0 ]; then
+  DOCKER_EXTRA_ARGS="--volume=${KOKORO_KEYSTORE_DIR}:/keystore:ro ${DOCKER_EXTRA_ARGS:-}"
+  # Bazel doesn't track changes to tools outside of the workspace
+  # (e.g. /usr/bin/gcc), so by appending the docker container to the
+  # remote_http_cache url, we make changes to the container part of
+  # the cache key. Hashing the key is to make it shorter and url-safe.
+  container_key=$(echo ${DOCKER_CONTAINER} | sha256sum | head -c 16)
+  BAZEL_EXTRA_ARGS="--remote_http_cache=https://storage.googleapis.com/absl-bazel-remote-cache/${container_key} --google_credentials=/keystore/73103_absl-bazel-remote-cache ${BAZEL_EXTRA_ARGS:-}"
+fi
+
+for std in ${STD}; do
+  for compilation_mode in ${COMPILATION_MODE}; do
+    for exceptions_mode in ${EXCEPTIONS_MODE}; do
+      echo "--------------------------------------------------------------------"
+      time docker run \
+        --volume="${ABSEIL_ROOT}:/abseil-cpp-ro:ro" \
+        --tmpfs=/abseil-cpp \
+        --workdir=/abseil-cpp \
+        --cap-add=SYS_PTRACE \
+        --rm \
+        -e CC="/opt/llvm/clang/bin/clang" \
+        -e BAZEL_COMPILER="llvm" \
+        -e BAZEL_CXXOPTS="-std=${std}:-nostdinc++" \
+        -e BAZEL_LINKOPTS="-L/opt/llvm/libcxx/lib:-lc++:-lc++abi:-lm:-Wl,-rpath=/opt/llvm/libcxx/lib" \
+        -e CPLUS_INCLUDE_PATH="/opt/llvm/libcxx/include/c++/v1" \
+        ${DOCKER_EXTRA_ARGS:-} \
+        ${DOCKER_CONTAINER} \
+        /bin/sh -c "
+          cp -r /abseil-cpp-ro/* /abseil-cpp/
+          if [ -n \"${ALTERNATE_OPTIONS:-}\" ]; then
+            cp ${ALTERNATE_OPTIONS:-} absl/base/options.h || exit 1
+          fi
+          /usr/local/bin/bazel test ... \
+            --compilation_mode=\"${compilation_mode}\" \
+            --copt=\"${exceptions_mode}\" \
+            --copt=-Werror \
+            --define=\"absl=1\" \
+            --keep_going \
+            --show_timestamps \
+            --test_env=\"GTEST_INSTALL_FAILURE_SIGNAL_HANDLER=1\" \
+            --test_env=\"TZDIR=/abseil-cpp/absl/time/internal/cctz/testdata/zoneinfo\" \
+            --test_output=errors \
+            --test_tag_filters=-benchmark \
+            ${BAZEL_EXTRA_ARGS:-}"
+    done
+  done
+done