shill: Fix most of warnings from cpplint

Fix most cpplinter's warnings. On a few occasisions, the warnings
produced were false-positives, so added explicit // NOLINT comment
overrides.

There were a few instances of disallowed non-const reference usage
(reported as runtime/reference error by cpplint) for
"DBus::Error &error" which should potentially be changed
to pointers to comply with C++ coding style but I will let Shill
owners do that since there is quite a few of those and the
change isn't brain-dead simple...

BUG=None
TEST=platform2 still compiles and all unit tests pass.

Change-Id: Ic2e31896aa13d20eeb1a85dee74f3db8cccfde2e
Reviewed-on: https://chromium-review.googlesource.com/204164
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Reviewed-by: mukesh agrawal <quiche@chromium.org>
Commit-Queue: Alex Vakulenko <avakulenko@chromium.org>
diff --git a/connection_health_checker.h b/connection_health_checker.h
index 936cc2c..7e2e9a8 100644
--- a/connection_health_checker.h
+++ b/connection_health_checker.h
@@ -5,6 +5,7 @@
 #ifndef SHILL_CONNECTION_HEALTH_CHECKER_H_
 #define SHILL_CONNECTION_HEALTH_CHECKER_H_
 
+#include <string>
 #include <vector>
 
 #include <base/basictypes.h>
@@ -40,7 +41,6 @@
 //   -(3)- Connectivity OK (TCP connection established, is healthy)
 class ConnectionHealthChecker {
  public:
-
   enum Result {
     // There was some problem in the setup of ConnctionHealthChecker.
     // Could not attempt a tcp connection.
@@ -99,24 +99,24 @@
     dispatcher_ = dispatcher;
   }
   void set_sock_fd(int sock_fd) { sock_fd_ = sock_fd; }
-  short num_connection_failures() const { return num_connection_failures_; }
-  void set_num_connection_failures(short val) {
+  int16_t num_connection_failures() const { return num_connection_failures_; }
+  void set_num_connection_failures(int16_t val) {
     num_connection_failures_ = val;
   }
-  short num_tx_queue_polling_attempts() const {
+  int16_t num_tx_queue_polling_attempts() const {
     return num_tx_queue_polling_attempts_;
   }
-  void set_num_tx_queue_polling_attempts(short val) {
+  void set_num_tx_queue_polling_attempts(int16_t val) {
     num_tx_queue_polling_attempts_ = val;
   }
-  short num_congested_queue_detected() const {
+  int16_t num_congested_queue_detected() const {
     return num_congested_queue_detected_;
   }
-  void set_num_congested_queue_detected(short val) {
+  void set_num_congested_queue_detected(int16_t val) {
     num_congested_queue_detected_ = val;
   }
-  short num_successful_sends() const { return num_successful_sends_; }
-  void set_num_successful_sends(short val) {
+  int16_t num_successful_sends() const { return num_successful_sends_; }
+  void set_num_successful_sends(int16_t val) {
     num_successful_sends_ = val;
   }
   void set_old_transmit_queue_value(uint64 val) {
@@ -212,13 +212,13 @@
 
   bool health_check_in_progress_;
   // Number of connection failures in currently active health check.
-  short num_connection_failures_;
+  int16_t num_connection_failures_;
   // Number of times we have checked the tx-queue for the current send attempt.
-  short num_tx_queue_polling_attempts_;
-  // Number of out of credit scenarios detected in currentl health check.
-  short num_congested_queue_detected_;
+  int16_t num_tx_queue_polling_attempts_;
+  // Number of out of credit scenarios detected in current health check.
+  int16_t num_congested_queue_detected_;
   // Number of successful send attempts currently active health check.
-  short num_successful_sends_;
+  int16_t num_successful_sends_;
 
   // Snooze time while polling for updated /proc/tcpinfo
   int tcp_state_update_wait_milliseconds_;