Switch to Starlark for C++ rules. (#887)

While I'm here, format all of the files that I touched.

BUILD.bazel

@@ -8,6 +8,8 @@ config_setting(
     visibility = [":__subpackages__"],
 )
 
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
 cc_library(
     name = "benchmark",
     srcs = glob(

WORKSPACE

@@ -3,7 +3,13 @@ workspace(name = "com_github_google_benchmark")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 
 http_archive(
-     name = "com_google_googletest",
-     urls = ["https://github.com/google/googletest/archive/3f0cf6b62ad1eb50d8736538363d3580dd640c3e.zip"],
-     strip_prefix = "googletest-3f0cf6b62ad1eb50d8736538363d3580dd640c3e",
+    name = "rules_cc",
+    strip_prefix = "rules_cc-a508235df92e71d537fcbae0c7c952ea6957a912",
+    urls = ["https://github.com/bazelbuild/rules_cc/archive/a508235df92e71d537fcbae0c7c952ea6957a912.zip"],
+)
+
+http_archive(
+    name = "com_google_googletest",
+    strip_prefix = "googletest-3f0cf6b62ad1eb50d8736538363d3580dd640c3e",
+    urls = ["https://github.com/google/googletest/archive/3f0cf6b62ad1eb50d8736538363d3580dd640c3e.zip"],
 )

test/BUILD

@@ -5,7 +5,7 @@ TEST_COPTS = [
     "-Wall",
     "-Wextra",
     "-Wshadow",
-#    "-Wshorten-64-to-32",
+    #    "-Wshorten-64-to-32",
     "-Wfloat-equal",
     "-fstrict-aliasing",
 ]
@@ -16,13 +16,14 @@ PER_SRC_COPTS = ({
     "donotoptimize_test.cc": ["-O3"],
 })
 
-
 TEST_ARGS = ["--benchmark_min_time=0.01"]
 
 PER_SRC_TEST_ARGS = ({
     "user_counters_tabular_test.cc": ["--benchmark_counters_tabular=true"],
 })
 
+load("@rules_cc//cc:defs.bzl", "cc_library", "cc_test")
+
 cc_library(
     name = "output_test_helper",
     testonly = 1,
@@ -53,7 +54,14 @@ cc_library(
         # FIXME: Add support for assembly tests to bazel.
         # See Issue #556
         # https://github.com/google/benchmark/issues/556
-  ) for test_src in glob(["*test.cc"], exclude = ["*_assembly_test.cc", "link_main_test.cc"])
+    )
+    for test_src in glob(
+        ["*test.cc"],
+        exclude = [
+            "*_assembly_test.cc",
+            "link_main_test.cc",
+        ],
+    )
 ]
 
 cc_test(