generalize the pattern of hash_map<const char*, ...>, use in BuildLog

Refactor the code in StatCache for use in BuildLog.  Now both use
hash tables where the keys are const char*.  Removes another 30ms
from Chrome no-op builds.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/build_log.h b/src/build_log.h
index f45cbde..4a11c1a 100644
--- a/src/build_log.h
+++ b/src/build_log.h
@@ -19,6 +19,8 @@
 #include <string>
 using namespace std;
 
+#include "hash_map.h"
+
 struct BuildConfig;
 struct Edge;
 
@@ -64,7 +66,7 @@ struct BuildLog {
   /// Rewrite the known log entries, throwing away old data.
   bool Recompact(const string& path, string* err);
 
-  typedef map<string, LogEntry*> Log;
+  typedef ExternalStringHashMap<LogEntry*>::Type Log;
   Log log_;
   FILE* log_file_;
   BuildConfig* config_;