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

base/process_linux.cc

Index: base/process_linux.cc
diff --git a/base/process_linux.cc b/base/process_linux.cc
index 3f78a31c193039a1dee54d7ff7be007c33c41a04..64c72ee37005da2ab4f4e135698f5704acc227d2 100644
--- a/base/process_linux.cc
+++ b/base/process_linux.cc
@@ -18,8 +18,6 @@ static const char kForegroundTasks[] =
     "/tmp/cgroup/cpu/chrome_renderers/foreground/tasks";
 static const char kBackgroundTasks[] =
     "/tmp/cgroup/cpu/chrome_renderers/background/tasks";
-static FilePath foreground_tasks;
-static FilePath background_tasks;
 #endif
 
 namespace base {
@@ -47,10 +45,10 @@ bool Process::SetProcessBackgrounded(bool background) {
   // one contains at most a single foreground renderer and the other contains
   // all background renderers. This allows us to limit the impact of background
   // renderers on foreground ones to a greater level than simple renicing.
+  FilePath foreground_tasks(kForegroundTasks);
+  FilePath background_tasks(kBackgroundTasks);
   if (!cgroups_inited) {
     cgroups_inited = true;
-    foreground_tasks = FilePath(kForegroundTasks);
-    background_tasks = FilePath(kBackgroundTasks);
     file_util::FileSystemType foreground_type;
     file_util::FileSystemType background_type;
     use_cgroups =