Switch to standard integer types in ui/.

ui/accessibility/ax_tree_update.h

Index: ui/accessibility/ax_tree_update.h
diff --git a/ui/accessibility/ax_tree_update.h b/ui/accessibility/ax_tree_update.h
index c7d272fe10f2495f1df41ee89fad3bd32014929f..662bdfa88db983c68c148e8602d6346c10c0b92e 100644
--- a/ui/accessibility/ax_tree_update.h
+++ b/ui/accessibility/ax_tree_update.h
@@ -5,6 +5,9 @@
 #ifndef UI_ACCESSIBILITY_AX_TREE_UPDATE_H_
 #define UI_ACCESSIBILITY_AX_TREE_UPDATE_H_
 
+#include <stddef.h>
+#include <stdint.h>
+
 #include <string>
 #include <vector>
 
@@ -95,7 +98,7 @@ std::string AXTreeUpdateBase<AXNodeData, AXTreeData>::ToString() const {
   // to the rest of the tree for context, so we have to try to show the
   // relative indentation of child nodes in this update relative to their
   // parents.
-  base::hash_map<int32, int> id_to_indentation;
+  base::hash_map<int32_t, int> id_to_indentation;
   for (size_t i = 0; i < nodes.size(); ++i) {
     int indent = id_to_indentation[nodes[i].id];
     result += std::string(2 * indent, ' ');