Revert of Added GetCpuTime to base/ to get total CPU time consumed by process for perf tests.

webrtc/base/cpu_time.cc

Index: webrtc/base/cpu_time.cc
diff --git a/webrtc/base/cpu_time.cc b/webrtc/base/cpu_time.cc
deleted file mode 100644
index 5fce36654e0c160644503a6e30fe151c0071ab0f..0000000000000000000000000000000000000000
--- a/webrtc/base/cpu_time.cc
+++ /dev/null
@@ -1,114 +0,0 @@
-/*
- *  Copyright (c) 2017 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 "webrtc/base/cpu_time.h"
-#include "webrtc/base/logging.h"
-#include "webrtc/base/timeutils.h"
-
-#if defined(WEBRTC_LINUX)
-#include <time.h>
-#elif defined(WEBRTC_MAC)
-#include <sys/resource.h>
-#include <sys/types.h>
-#include <sys/times.h>
-#include <mach/thread_info.h>
-#include <mach/thread_act.h>
-#include <mach/mach_init.h>
-#include <unistd.h>
-#elif defined(WEBRTC_WIN)
-#include <windows.h>
-#endif
-
-#if defined(WEBRTC_WIN)
-namespace {
-// FILETIME resolution is 100 nanosecs.
-const int64_t kNanosecsPerFiletime = 100;
-}  // namespace
-#endif
-
-namespace rtc {
-
-int64_t GetProcessCpuTimeNanos() {
-#if defined(WEBRTC_LINUX)
-  struct timespec ts;
-  if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &ts) == 0) {
-    return ts.tv_sec * kNumNanosecsPerSec + ts.tv_nsec;
-  } else {
-    LOG_ERR(LS_ERROR) << "clock_gettime() failed.";
-  }
-#elif defined(WEBRTC_MAC)
-  struct rusage rusage;
-  if (getrusage(RUSAGE_SELF, &rusage) == 0) {
-    return rusage.ru_utime.tv_sec * kNumNanosecsPerSec +
-           rusage.ru_utime.tv_usec * kNumNanosecsPerMicrosec;
-  } else {
-    LOG_ERR(LS_ERROR) << "getrusage() failed.";
-  }
-#elif defined(WEBRTC_WIN)
-  FILETIME createTime;
-  FILETIME exitTime;
-  FILETIME kernelTime;
-  FILETIME userTime;
-  if (GetProcessTimes(GetCurrentProcess(), &createTime, &exitTime, &kernelTime,
-                      &userTime) != 0) {
-    return ((static_cast<uint64_t>(userTime.dwHighDateTime) << 32) +
-            userTime.dwLowDateTime) *
-           kNanosecsPerFiletime;
-  } else {
-    LOG_ERR(LS_ERROR) << "GetProcessTimes() failed.";
-  }
-#else
-  // Not implemented yet.
-  static_assert(
-      false, "GetProcessCpuTimeNanos() platform support not yet implemented.");
-#endif
-  return -1;
-}
-
-int64_t GetThreadCpuTimeNanos() {
-#if defined(WEBRTC_LINUX)
-  struct timespec ts;
-  if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0) {
-    return ts.tv_sec * kNumNanosecsPerSec + ts.tv_nsec;
-  } else {
-    LOG_ERR(LS_ERROR) << "clock_gettime() failed.";
-  }
-#elif defined(WEBRTC_MAC)
-  thread_basic_info_data_t info;
-  mach_msg_type_number_t count = THREAD_BASIC_INFO_COUNT;
-  if (thread_info(mach_thread_self(), THREAD_BASIC_INFO, (thread_info_t)&info,
-                  &count) == KERN_SUCCESS) {
-    return info.user_time.seconds * kNumNanosecsPerSec +
-           info.user_time.microseconds * kNumNanosecsPerMicrosec;
-  } else {
-    LOG_ERR(LS_ERROR) << "thread_info() failed.";
-  }
-#elif defined(WEBRTC_WIN)
-  FILETIME createTime;
-  FILETIME exitTime;
-  FILETIME kernelTime;
-  FILETIME userTime;
-  if (GetThreadTimes(GetCurrentThread(), &createTime, &exitTime, &kernelTime,
-                     &userTime) != 0) {
-    return ((static_cast<uint64_t>(userTime.dwHighDateTime) << 32) +
-            userTime.dwLowDateTime) *
-           kNanosecsPerFiletime;
-  } else {
-    LOG_ERR(LS_ERROR) << "GetThreadTimes() failed.";
-  }
-#else
-  // Not implemented yet.
-  static_assert(
-      false, "GetProcessCpuTimeNanos() platform support not yet implemented.");
-#endif
-  return -1;
-}
-
-}  // namespace rtc