update_engine_client: Fixes some styling/lint issues

Fixed some styling/lint issues introduced in CL:556356

BUG=none
TEST=cros_workon_make --board=amd64-generic --test update_engine

Change-Id: I80525d4fba5a7fea5be533ccaa0026bd381d4175
Reviewed-on: https://chromium-review.googlesource.com/592071
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Sen Jiang <senj@chromium.org>
diff --git a/update_engine_client.cc b/update_engine_client.cc
index f337dd6..ad6ded0 100644
--- a/update_engine_client.cc
+++ b/update_engine_client.cc
@@ -14,13 +14,6 @@
 // limitations under the License.
 //
 
-#include <base/bind.h>
-#include <base/command_line.h>
-#include <base/logging.h>
-#include <base/macros.h>
-#include <brillo/daemons/daemon.h>
-#include <brillo/flag_helper.h>
-
 #include <inttypes.h>
 #include <sysexits.h>
 #include <unistd.h>
@@ -29,6 +22,14 @@
 #include <string>
 #include <vector>
 
+#include <base/bind.h>
+#include <base/command_line.h>
+#include <base/logging.h>
+#include <base/macros.h>
+#include <base/threading/platform_thread.h>
+#include <brillo/daemons/daemon.h>
+#include <brillo/flag_helper.h>
+
 #include "update_engine/client.h"
 #include "update_engine/common/error_code.h"
 #include "update_engine/common/error_code_utils.h"
@@ -55,7 +56,7 @@
 // The ShowStatus request will be retried `kShowStatusRetryCount` times at
 // `kShowStatusRetryInterval` second intervals on failure.
 const int kShowStatusRetryCount = 30;
-const int kShowStatusRetryInterval = 2;
+const int kShowStatusRetryIntervalInSeconds = 2;
 
 class UpdateEngineClient : public brillo::Daemon {
  public:
@@ -165,8 +166,9 @@
     if (--retry_count == 0) {
       return false;
     }
-    LOG(WARNING) << "Trying " << retry_count << " more times";
-    sleep(kShowStatusRetryInterval);
+    LOG(WARNING) << "Will try " << retry_count << " more times!";
+    base::PlatformThread::Sleep(
+        base::TimeDelta::FromSeconds(kShowStatusRetryIntervalInSeconds));
   }
 
   printf("LAST_CHECKED_TIME=%" PRIi64