Remove the remaining exit time destructors from base for linux and chromeos.

base/linux_util.cc

Index: base/linux_util.cc
diff --git a/base/linux_util.cc b/base/linux_util.cc
index 67514696c5c2dc4f3244b2b060aed6760e6429fd..143d9193b2bf9c1a662ae7cac22b366d697971e5 100644
--- a/base/linux_util.cc
+++ b/base/linux_util.cc
@@ -154,9 +154,9 @@ std::string GetLinuxDistro() {
     base::GetAppOutput(CommandLine(argv), &output);
     if (output.length() > 0) {
       // lsb_release -d should return: Description:<tab>Distro Info
-      static const std::string field = "Description:\t";
-      if (output.compare(0, field.length(), field) == 0) {
-        SetLinuxDistro(output.substr(field.length()));
+      const char field[] = "Description:\t";
+      if (output.compare(0, strlen(field), field) == 0) {
+        SetLinuxDistro(output.substr(strlen(field)));
       }
     }
     distro_state_singleton->CheckFinished();