Switch to standard integer types in sync/.

sync/internal_api/js_mutation_event_observer.h

Index: sync/internal_api/js_mutation_event_observer.h
diff --git a/sync/internal_api/js_mutation_event_observer.h b/sync/internal_api/js_mutation_event_observer.h
index e274c55b70c1f4638cd203edcc6ff1697872d4b8..da8529d1e75391834bfc4cc89eca74fd88487ce2 100644
--- a/sync/internal_api/js_mutation_event_observer.h
+++ b/sync/internal_api/js_mutation_event_observer.h
@@ -5,10 +5,12 @@
 #ifndef SYNC_INTERNAL_API_JS_MUTATION_EVENT_OBSERVER_H_
 #define SYNC_INTERNAL_API_JS_MUTATION_EVENT_OBSERVER_H_
 
+#include <stdint.h>
+
 #include <string>
 
-#include "base/basictypes.h"
 #include "base/compiler_specific.h"
+#include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/non_thread_safe.h"
 #include "sync/base/sync_export.h"
@@ -44,7 +46,7 @@ class SYNC_EXPORT JsMutationEventObserver
 
   // SyncManager::ChangeObserver implementation.
   void OnChangesApplied(ModelType model_type,
-                        int64 write_transaction_id,
+                        int64_t write_transaction_id,
                         const ImmutableChangeRecordList& changes) override;
   void OnChangesComplete(ModelType model_type) override;