Implemented process_util_mac.mm because net_unittests requires those function...

base/process_util.h

Index: base/process_util.h
===================================================================
--- base/process_util.h	(revision 9017)
+++ base/process_util.h	(working copy)
@@ -8,8 +8,6 @@
 #ifndef BASE_PROCESS_UTIL_H_
 #define BASE_PROCESS_UTIL_H_
 
-#include "base/basictypes.h"
-
 #if defined(OS_WIN)
 #include <windows.h>
 #include <tlhelp32.h>
@@ -20,7 +18,9 @@
 #endif
 
 #include <string>
+#include <vector>
 
+#include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/process.h"
 
@@ -28,6 +28,7 @@
 typedef PROCESSENTRY32 ProcessEntry;
 typedef IO_COUNTERS IoCounters;
 #elif defined(OS_POSIX)
+// TODO(port): we should not rely on Win32 structure.
 struct ProcessEntry {
   int pid;
   int ppid;
@@ -44,6 +45,10 @@
 };
 #endif
 
+#if defined(OS_MACOSX)
+struct kinfo_proc;
+#endif
+
 namespace base {
 
 // A minimalistic but hopefully cross-platform set of exit codes.
@@ -215,9 +220,9 @@
 #elif defined(OS_LINUX)
   DIR *procfs_dir_;
 #elif defined(OS_MACOSX)
-  // probably kvm_t *kvmd_;
+  std::vector<kinfo_proc> kinfo_procs_;
+  size_t index_of_kinfo_proc_;
 #endif
-
   ProcessEntry entry_;
   const ProcessFilter* filter_;