Add compiler-specific "examine printf format" attributes to printfs.

chrome/browser/metrics/metrics_service.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 
 //------------------------------------------------------------------------------
 // Description of the life cycle of a instance of MetricsService.
 //
 //  OVERVIEW
@@ skipping 759 matching lines @@
 #else
   uint64 sixteen_bytes[2] = { base::RandUint64(), base::RandUint64() };
   return RandomBytesToGUIDString(sixteen_bytes);
 #endif
 }
 
 #if defined(OS_POSIX)
 // TODO(cmasone): Once we're comfortable this works, migrate Windows code to
 // use this as well.
 std::string MetricsService::RandomBytesToGUIDString(const uint64 bytes[2]) {
-  return StringPrintf("%08llX-%04llX-%04llX-%04llX-%012llX",
-                      bytes[0] >> 32,
-                      (bytes[0] >> 16) & 0x0000ffff,
-                      bytes[0] & 0x0000ffff,
-                      bytes[1] >> 48,
+  return StringPrintf("%08X-%04X-%04X-%04X-%012llX",
+                      static_cast<unsigned int>(bytes[0] >> 32),
+                      static_cast<unsigned int>((bytes[0] >> 16) & 0x0000ffff),
+                      static_cast<unsigned int>(bytes[0] & 0x0000ffff),
+                      static_cast<unsigned int>(bytes[1] >> 48),
                       bytes[1] & 0x0000ffffffffffffULL);
 }
 #endif
 
 //------------------------------------------------------------------------------
 // State save methods
 
 void MetricsService::ScheduleNextStateSave() {
   state_saver_factory_.RevokeAll();
 
@@ skipping 1130 matching lines @@
     thread_id = PlatformThread::CurrentId();
   return PlatformThread::CurrentId() == thread_id;
 }
 
 #if defined(OS_CHROMEOS)
 void MetricsService::StartExternalMetrics(Profile* profile) {
   external_metrics_ = new chromeos::ExternalMetrics;
   external_metrics_->Start(profile);
 }
 #endif