Move to anonymous namespace

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@98469 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/CacheTokens.cpp b/lib/Frontend/CacheTokens.cpp
index ab5465a..21db55b 100644
--- a/lib/Frontend/CacheTokens.cpp
+++ b/lib/Frontend/CacheTokens.cpp
@@ -562,13 +562,13 @@
 
 //===----------------------------------------------------------------------===//
 
+namespace {
 class PTHIdKey {
 public:
   const IdentifierInfo* II;
   uint32_t FileOffset;
 };
 
-namespace {
 class PTHIdentifierTableTrait {
 public:
   typedef PTHIdKey* key_type;