map::size() returns a size_t.

cloud_print/gcp20/prototype/print_job_handler.cc

Index: cloud_print/gcp20/prototype/print_job_handler.cc
diff --git a/cloud_print/gcp20/prototype/print_job_handler.cc b/cloud_print/gcp20/prototype/print_job_handler.cc
index 7bbc1af701e83ced8dc6703df0ae59418dd19408..a82f26f88873d9d34ee3ce5da4cab4b5bfcf5335 100644
--- a/cloud_print/gcp20/prototype/print_job_handler.cc
+++ b/cloud_print/gcp20/prototype/print_job_handler.cc
@@ -25,7 +25,7 @@ const int kErrorTimeoutSec = 30;
 // Errors simulation constants:
 const double kPaperJamProbability = 0.2;
 const int kTooManyDraftsTimeout = 10;
-const int kMaxDrafts = 5;
+const size_t kMaxDrafts = 5;
 
 const base::FilePath::CharType kJobsPath[] = FILE_PATH_LITERAL("printjobs");