Switch to standard integer types in sync/.

sync/engine/directory_commit_contribution.h

Index: sync/engine/directory_commit_contribution.h
diff --git a/sync/engine/directory_commit_contribution.h b/sync/engine/directory_commit_contribution.h
index dabb7d96b06c755f4114fac85f27f9347b14207a..b0ed9c8e11a4b34e6b3d9b00b4daf547b3830213 100644
--- a/sync/engine/directory_commit_contribution.h
+++ b/sync/engine/directory_commit_contribution.h
@@ -5,9 +5,13 @@
 #ifndef SYNC_ENGINE_DIRECTORY_COMMIT_CONTRIBUTION_H_
 #define SYNC_ENGINE_DIRECTORY_COMMIT_CONTRIBUTION_H_
 
+#include <stddef.h>
+#include <stdint.h>
+
 #include <vector>
 
 #include "base/gtest_prod_util.h"
+#include "base/macros.h"
 #include "base/memory/scoped_ptr.h"
 #include "sync/base/sync_export.h"
 #include "sync/engine/commit_contribution.h"
@@ -81,7 +85,7 @@ class SYNC_EXPORT DirectoryCommitContribution : public CommitContribution {
                            GatherAndTruncate);
 
   DirectoryCommitContribution(
-      const std::vector<int64>& metahandles,
+      const std::vector<int64_t>& metahandles,
       const google::protobuf::RepeatedPtrField<sync_pb::SyncEntity>& entities,
       const sync_pb::DataTypeContext& context,
       syncable::Directory* directory,
@@ -90,7 +94,7 @@ class SYNC_EXPORT DirectoryCommitContribution : public CommitContribution {
   void UnsetSyncingBits();
 
   syncable::Directory* dir_;
-  const std::vector<int64> metahandles_;
+  const std::vector<int64_t> metahandles_;
   const google::protobuf::RepeatedPtrField<sync_pb::SyncEntity> entities_;
   sync_pb::DataTypeContext context_;
   size_t entries_start_index_;