Proposal: Use /usr/bin/top in about:memory...

chrome/browser/process_info_snapshot_mac_unittest.cc

 // Copyright (c) 2009 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 "chrome/browser/process_info_snapshot.h"
 
 #include <sys/types.h>  // For |uid_t| (and |pid_t|).
 #include <unistd.h>  // For |getpid()|, |getuid()|, etc.
 
 #include <vector>
@@ skipping 59 matching lines @@
   ProcessInfoSnapshot::ProcInfoEntry proc_info;
   ASSERT_TRUE(snapshot.GetProcInfo(pid, &proc_info));
   EXPECT_EQ(pid, proc_info.pid);
   EXPECT_EQ(ppid, proc_info.ppid);
   EXPECT_EQ(uid, proc_info.uid);
   EXPECT_EQ(euid, proc_info.euid);
   EXPECT_GE(proc_info.rss, 100u);     // Sanity check: we're running, so we
                                       // should occupy at least 100 kilobytes.
   EXPECT_GE(proc_info.vsize, 1024u);  // Sanity check: our |vsize| is presumably
                                       // at least a megabyte.
+  EXPECT_GE(proc_info.rshrd, 1024u);  // Shared memory should also > 1 MB.
+  EXPECT_GE(proc_info.rprvt, 1024u);  // Same with private memory.
 
   // Find our parent.
   ASSERT_TRUE(snapshot.GetProcInfo(ppid, &proc_info));
   EXPECT_EQ(ppid, proc_info.pid);
   EXPECT_NE(static_cast<int64>(proc_info.ppid), 0);
   EXPECT_EQ(uid, proc_info.uid);    // This (and the following) should be true
   EXPECT_EQ(euid, proc_info.euid);  // under reasonable circumstances.
   // Can't say anything definite about its |rss|.
   EXPECT_GT(proc_info.vsize, 0u);   // Its |vsize| should be nonzero though.
 }
@@ skipping 11 matching lines @@
 
   ProcessInfoSnapshot::ProcInfoEntry proc_info;
   ASSERT_TRUE(snapshot.GetProcInfo(process_handle, &proc_info));
   // Effective user ID should be 0 (root).
   EXPECT_EQ(proc_info.euid, 0u);
   // Real user ID should match the calling process's user id.
   EXPECT_EQ(proc_info.uid, geteuid());
 
   ASSERT_TRUE(base::KillProcess(process_handle, 0, true));
 }