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

chrome/common/child_process_info.cc

Index: chrome/common/child_process_info.cc
diff --git a/chrome/common/child_process_info.cc b/chrome/common/child_process_info.cc
index 4eafde83046aa32aafba690df71cf62991a6d48e..c915e8077c529527ef523073def4104193cc0733 100644
--- a/chrome/common/child_process_info.cc
+++ b/chrome/common/child_process_info.cc
@@ -106,7 +106,7 @@ std::string ChildProcessInfo::GenerateRandomChannelID(void* instance) {
   // parent browser process, an identifier for the child instance, and a random
   // component. We use a random component so that a hacked child process can't
   // cause denial of service by causing future named pipe creation to fail.
-  return StringPrintf("%d.%x.%d",
+  return StringPrintf("%d.%p.%d",
                       base::GetCurrentProcId(), instance,
                       base::RandInt(0, std::numeric_limits<int>::max()));
 }