Switch to standard integer types in base/.

base/task/cancelable_task_tracker.cc

Index: base/task/cancelable_task_tracker.cc
diff --git a/base/task/cancelable_task_tracker.cc b/base/task/cancelable_task_tracker.cc
index a2e4799f43854485f9d077c27155683ab66ccf47..a756f4ec3eec50b56a12321cac4ad46f3cd5785c 100644
--- a/base/task/cancelable_task_tracker.cc
+++ b/base/task/cancelable_task_tracker.cc
@@ -4,6 +4,8 @@
 
 #include "base/task/cancelable_task_tracker.h"
 
+#include <stddef.h>
+
 #include <utility>
 
 #include "base/bind.h"
@@ -92,7 +94,7 @@ CancelableTaskTracker::TaskId CancelableTaskTracker::PostTaskAndReply(
   CancellationFlag* flag = new CancellationFlag();
 
   TaskId id = next_id_;
-  next_id_++;  // int64 is big enough that we ignore the potential overflow.
+  next_id_++;  // int64_t is big enough that we ignore the potential overflow.
 
   const Closure& untrack_closure =
       Bind(&CancelableTaskTracker::Untrack, weak_factory_.GetWeakPtr(), id);
@@ -117,7 +119,7 @@ CancelableTaskTracker::TaskId CancelableTaskTracker::NewTrackedTaskId(
   DCHECK(base::ThreadTaskRunnerHandle::IsSet());
 
   TaskId id = next_id_;
-  next_id_++;  // int64 is big enough that we ignore the potential overflow.
+  next_id_++;  // int64_t is big enough that we ignore the potential overflow.
 
   // Will be deleted by |untrack_and_delete_flag| after Untrack().
   CancellationFlag* flag = new CancellationFlag();