Mac: fix error message which mentions top instead of ps.

chrome/browser/process_info_snapshot_mac.cc

Index: chrome/browser/process_info_snapshot_mac.cc
diff --git a/chrome/browser/process_info_snapshot_mac.cc b/chrome/browser/process_info_snapshot_mac.cc
index 7e8117be6742e30171e57afb3aecb2b265da5d50..611f8f40a90f48f8c3408d35437fa2da35b75b67 100644
--- a/chrome/browser/process_info_snapshot_mac.cc
+++ b/chrome/browser/process_info_snapshot_mac.cc
@@ -25,10 +25,11 @@ ProcessInfoSnapshot::~ProcessInfoSnapshot() {
 // Note: we ignore the "tsiz" (text size) display option of ps because it's
 // always zero (tested on 10.5 and 10.6).
 bool ProcessInfoSnapshot::Sample(std::vector<base::ProcessId> pid_list) {
+  const char* kPsPathName = "/bin/ps";
   Reset();
 
   std::vector<std::string> argv;
-  argv.push_back("/bin/ps");
+  argv.push_back(kPsPathName);
   // Get PID, PPID, (real) UID, effective UID, resident set size, virtual memory
   // size, and command.
   argv.push_back("-o");
@@ -44,7 +45,7 @@ bool ProcessInfoSnapshot::Sample(std::vector<base::ProcessId> pid_list) {
   CommandLine command_line(argv);
   if (!base::GetAppOutputRestricted(command_line,
                                     &output, (pid_list.size() + 10) * 100)) {
-    LOG(ERROR) << "Failure running /bin/ps to acquire data.";
+    LOG(ERROR) << "Failure running " << kPsPathName << " to acquire data.";
     return false;
   }
 
@@ -70,18 +71,18 @@ bool ProcessInfoSnapshot::Sample(std::vector<base::ProcessId> pid_list) {
     in.ignore(1, ' ');                    // Eat the space.
     std::getline(in, proc_info.command);  // Get the rest of the line.
     if (!in.good()) {
-      LOG(ERROR) << "Error parsing output from /usr/bin/top.";
+      LOG(ERROR) << "Error parsing output from " << kPsPathName << ".";
       return false;
     }
 
     // Make sure the new PID isn't already in our list.
     if (proc_info_entries_.find(proc_info.pid) != proc_info_entries_.end()) {
-      LOG(ERROR) << "Duplicate PID in output from /bin/ps.";
+      LOG(ERROR) << "Duplicate PID in output from " << kPsPathName << ".";
       return false;
     }
 
     if (!proc_info.pid || ! proc_info.vsize) {
-      LOG(WARNING) << "Invalid data from /bin/ps.";
+      LOG(WARNING) << "Invalid data from " << kPsPathName << ".";
       return false;
     }