Revert of Revert of clang/win: Fix a few warnings in targets not in chromium_builder_tests.

cloud_print/gcp20/prototype/x_privet_token.cc

Index: cloud_print/gcp20/prototype/x_privet_token.cc
diff --git a/cloud_print/gcp20/prototype/x_privet_token.cc b/cloud_print/gcp20/prototype/x_privet_token.cc
index df26d8e88da35e6d5124c5cdadf3d4681e3e3638..4093ccb297db301766bf61992ea77ed9dd16c6a6 100644
--- a/cloud_print/gcp20/prototype/x_privet_token.cc
+++ b/cloud_print/gcp20/prototype/x_privet_token.cc
@@ -59,7 +59,7 @@
 
 std::string XPrivetToken::GenerateXTokenWithTime(uint64 issue_time) const {
   std::string result;
-  std::string issue_time_str = base::StringPrintf("%"PRIu64, issue_time);
+  std::string issue_time_str = base::StringPrintf("%" PRIu64, issue_time);
   std::string hash = base::SHA1HashString(secret_ +
                                           kXPrivetTokenDelimeter +
                                           issue_time_str);