Move some parts of ProcessReader (in snapshot) to ProcessInfo (in util)

util/posix/process_util_test.cc

-// Copyright 2014 The Crashpad Authors. All rights reserved.
-//
-// 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
-//
-//     http://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.
-
-#include "util/posix/process_util.h"
-
-#include <crt_externs.h>
-#include <unistd.h>
-
-#include <string>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "gtest/gtest.h"
-
-namespace crashpad {
-namespace test {
-namespace {
-
-TEST(ProcessUtil, ProcessArgumentsForPID) {
-  std::vector<std::string> argv;
-  ASSERT_TRUE(ProcessArgumentsForPID(getpid(), &argv));
-
-  // gtest argv processing scrambles argv, but it leaves argc and argv[0]
-  // intact, so test those.
-
-  int argc = implicit_cast<int>(argv.size());
-  int expect_argc = *_NSGetArgc();
-  EXPECT_EQ(expect_argc, argc);
-
-  ASSERT_GE(expect_argc, 1);
-  ASSERT_GE(argc, 1);
-
-  char** expect_argv = *_NSGetArgv();
-  EXPECT_EQ(std::string(expect_argv[0]), argv[0]);
-}
-
-}  // namespace
-}  // namespace test
-}  // namespace crashpad