Switch to standard integer types in components/, part 4 of 4.

components/sync_driver/invalidation_adapter.cc

Index: components/sync_driver/invalidation_adapter.cc
diff --git a/components/sync_driver/invalidation_adapter.cc b/components/sync_driver/invalidation_adapter.cc
index a7cc8d5671f4bae219de6c240c0f3740b466e78d..dcc14d6984f5e5cd6004c2d3290231a1a0eea209 100644
--- a/components/sync_driver/invalidation_adapter.cc
+++ b/components/sync_driver/invalidation_adapter.cc
@@ -24,7 +24,7 @@ const std::string& InvalidationAdapter::GetPayload() const {
   return invalidation_.payload();
 }
 
-int64 InvalidationAdapter::GetVersion() const {
+int64_t InvalidationAdapter::GetVersion() const {
   return invalidation_.version();
 }