Remove unused files linux.cc/.h and linuxfdwalk.c/.h.

webrtc/base/linuxfdwalk_unittest.cc

-/*
- *  Copyright 2009 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include <set>
-#include <sstream>
-
-#include "webrtc/base/gunit.h"
-#include "webrtc/base/linuxfdwalk.h"
-
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-static const int kArbitraryLargeFdNumber = 424;
-
-static void FdCheckVisitor(void *data, int fd) {
-  std::set<int> *fds = static_cast<std::set<int> *>(data);
-  EXPECT_EQ(1U, fds->erase(fd));
-}
-
-static void FdEnumVisitor(void *data, int fd) {
-  std::set<int> *fds = static_cast<std::set<int> *>(data);
-  EXPECT_TRUE(fds->insert(fd).second);
-}
-
-// Checks that the set of open fds is exactly the given list.
-static void CheckOpenFdList(std::set<int> fds) {
-  EXPECT_EQ(0, fdwalk(&FdCheckVisitor, &fds));
-  EXPECT_EQ(0U, fds.size());
-}
-
-static void GetOpenFdList(std::set<int> *fds) {
-  fds->clear();
-  EXPECT_EQ(0, fdwalk(&FdEnumVisitor, fds));
-}
-
-TEST(LinuxFdWalk, TestFdWalk) {
-  std::set<int> fds;
-  GetOpenFdList(&fds);
-  std::ostringstream str;
-  // I have observed that the open set when starting a test is [0, 6]. Leaked
-  // fds would change that, but so can (e.g.) running under a debugger, so we
-  // can't really do an EXPECT. :(
-  str << "File descriptors open in test executable:";
-  for (std::set<int>::const_iterator i = fds.begin(); i != fds.end(); ++i) {
-    str << " " << *i;
-  }
-  LOG(LS_INFO) << str.str();
-  // Open some files.
-  int fd1 = open("/dev/null", O_RDONLY);
-  EXPECT_LE(0, fd1);
-  int fd2 = open("/dev/null", O_WRONLY);
-  EXPECT_LE(0, fd2);
-  int fd3 = open("/dev/null", O_RDWR);
-  EXPECT_LE(0, fd3);
-  int fd4 = dup2(fd3, kArbitraryLargeFdNumber);
-  EXPECT_LE(0, fd4);
-  EXPECT_TRUE(fds.insert(fd1).second);
-  EXPECT_TRUE(fds.insert(fd2).second);
-  EXPECT_TRUE(fds.insert(fd3).second);
-  EXPECT_TRUE(fds.insert(fd4).second);
-  CheckOpenFdList(fds);
-  EXPECT_EQ(0, close(fd1));
-  EXPECT_EQ(0, close(fd2));
-  EXPECT_EQ(0, close(fd3));
-  EXPECT_EQ(0, close(fd4));
-}