Roll forward to cl/314747126

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: Ie19e006429b138b3768e97dae971a43fdc5ef8bf

cpp/platform/impl/g3/BUILD

@@ -0,0 +1,41 @@
+# Copyright 2020 Google LLC
+#
+# 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.
+
+cc_library(
+    name = "g3",
+    srcs = [
+        "atomic_reference_impl.h",
+        "platform.cc",
+        "settable_future_impl.h",
+        "system_clock_impl.h",
+    ],
+    visibility = [
+        "//googlemac/iPhone/Shared/Nearby/Connections:__subpackages__",
+        "//core:__subpackages__",
+        "//platform:__subpackages__",
+    ],
+    deps = [
+        "//platform:types",
+        "//platform/api",
+        "//platform/impl/shared:atomic_boolean",
+        "//platform/impl/shared:file",
+        "//platform/impl/shared:posix_condition_variable",
+        "//platform/impl/shared:posix_lock",
+        "//platform/port:string",
+        "//absl/base:core_headers",
+        "//absl/synchronization",
+        "//absl/time",
+        "//absl/types:any",
+    ],
+)