Pure pedantry: Replace all ".size() == 0" with ".empty()".

chrome/browser/process_info_snapshot_mac.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/sysctl.h>
 
 #include <sstream>
 
@@ skipping 231 matching lines @@
     size_t i;
     for (i = 0; i < arraysize(values); i++) {
       in >> values[i];
       if (in.fail())
         break;
       std::string unit;
       in >> unit;
       if (in.fail())
         break;
 
-      if (unit.size() == 0)
+      if (unit.empty())
         break;
 
       uint64_t scale;
       if (!ConvertByteUnitToScale(unit[0], &scale))
         break;
       values[i] *= scale;
     }
     if (i != arraysize(values))
       continue;
 
@@ skipping 76 matching lines @@
   }
 
   return true;
 }
 
 
 bool ProcessInfoSnapshot::Sample(std::vector<base::ProcessId> pid_list) {
   Reset();
 
   // Nothing to do if no PIDs given.
-  if (pid_list.size() == 0)
+  if (pid_list.empty())
     return true;
   if (pid_list.size() > kMaxPidListSize) {
     // The spec says |pid_list| *must* not have more than this many entries.
     NOTREACHED();
     return false;
   }
 
   // Get basic process info from KERN_PROC.
   for (std::vector<base::ProcessId>::iterator it = pid_list.begin();
        it != pid_list.end(); ++it) {
@@ skipping 96 matching lines @@
     ws_usage->shareable = 0;
     ws_usage->shared = 0;
     return false;
   }
 
   ws_usage->priv = proc_info.rprvt / 1024;
   ws_usage->shareable = proc_info.rss / 1024;
   ws_usage->shared = proc_info.rshrd / 1024;
   return true;
 }