base: Fix minor warnings reported by cppcheck.

base/process_util_posix.cc

Index: base/process_util_posix.cc
diff --git a/base/process_util_posix.cc b/base/process_util_posix.cc
index a6e816af4484eeeb545cded16f9e4dd25533a62b..9ea0e41e7167b12857b97d641839435e40697dcb 100644
--- a/base/process_util_posix.cc
+++ b/base/process_util_posix.cc
@@ -253,11 +253,7 @@ bool KillProcess(ProcessHandle process_id, int exit_code, bool wait) {
   DCHECK_GT(process_id, 1) << " tried to kill invalid process_id";
   if (process_id <= 1)
     return false;
-  static unsigned kMaxSleepMs = 1000;
-  unsigned sleep_ms = 4;
-
   bool result = kill(process_id, SIGTERM) == 0;
-
   if (result && wait) {
     int tries = 60;
 
@@ -267,6 +263,8 @@ bool KillProcess(ProcessHandle process_id, int exit_code, bool wait) {
       tries *= 2;
     }
 
+    unsigned sleep_ms = 4;
+
     // The process may not end immediately due to pending I/O
     bool exited = false;
     while (tries-- > 0) {
@@ -286,6 +284,7 @@ bool KillProcess(ProcessHandle process_id, int exit_code, bool wait) {
       }
 
       usleep(sleep_ms * 1000);
+      const unsigned kMaxSleepMs = 1000;
       if (sleep_ms < kMaxSleepMs)
         sleep_ms *= 2;
     }