base: Remove the remaining usage GG_(U)INTn_C macros.

base/rand_util.cc

Index: base/rand_util.cc
diff --git a/base/rand_util.cc b/base/rand_util.cc
index 1525b91449d438089a67b89f23521941a80e4500..931eb4e943e646e2f39e2848b33683247b5b4725 100644
--- a/base/rand_util.cc
+++ b/base/rand_util.cc
@@ -5,6 +5,7 @@
 #include "base/rand_util.h"
 
 #include <math.h>
+#include <stdint.h>
 
 #include <algorithm>
 #include <limits>
@@ -37,7 +38,7 @@ double BitsToOpenEndedUnitInterval(uint64 bits) {
 
   COMPILE_ASSERT(std::numeric_limits<double>::radix == 2, otherwise_use_scalbn);
   static const int kBits = std::numeric_limits<double>::digits;
-  uint64 random_bits = bits & ((GG_UINT64_C(1) << kBits) - 1);
+  uint64 random_bits = bits & ((UINT64_C(1) << kBits) - 1);
   double result = ldexp(static_cast<double>(random_bits), -1 * kBits);
   DCHECK_GE(result, 0.0);
   DCHECK_LT(result, 1.0);