Move malloc/partition_alloc memory usage functions to base

base/process/process_metrics_posix.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/process/process_metrics.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <sys/resource.h>
 #include <sys/time.h>
 #include <unistd.h>
 
 #include "base/logging.h"
 #include "build/build_config.h"
 
+#if defined(OS_MACOSX)
+#include <malloc/malloc.h>
+#else
+#include <malloc.h>
+#endif
+
 namespace base {
 
 int64_t TimeValToMicroseconds(const struct timeval& tv) {
   int64_t ret = tv.tv_sec;  // Avoid (int * int) integer overflow.
   ret *= Time::kMicrosecondsPerSecond;
   ret += tv.tv_usec;
   return ret;
 }
 
 ProcessMetrics::~ProcessMetrics() { }
@@ skipping 49 matching lines @@
     }
   } else {
     PLOG(INFO) << "Failed to get file descriptor limit";
   }
 }
 
 size_t GetPageSize() {
   return getpagesize();
 }
 
+size_t ProcessMetrics::GetMallocUsage() {
+#if defined(OS_MACOSX) || defined(OS_IOS)
+  malloc_statistics_t stats = {0};
+  malloc_zone_statistics(nullptr, &stats);
+  return stats.size_in_use;
+#elif defined(OS_LINUX) || defined(OS_ANDROID)
+  struct mallinfo minfo = mallinfo();
+#if defined(USE_TCMALLOC)
+  return minfo.uordblks;
+#else
+  return minfo.hblkhd + minfo.arena;
+#endif
+#endif
+}
+
 }  // namespace base