[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_type_reference_map.h

Index: extensions/renderer/bindings/api_type_reference_map.h
diff --git a/extensions/renderer/api_type_reference_map.h b/extensions/renderer/bindings/api_type_reference_map.h
similarity index 93%
rename from extensions/renderer/api_type_reference_map.h
rename to extensions/renderer/bindings/api_type_reference_map.h
index 45a975a30c76c3ec16ff2e5e341218de69a59217..ddc1f689d31df63d2465d3fe09694426f16e1039 100644
--- a/extensions/renderer/api_type_reference_map.h
+++ b/extensions/renderer/bindings/api_type_reference_map.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef EXTENSIONS_RENDERER_API_TYPE_REFERENCE_MAP_H_
-#define EXTENSIONS_RENDERER_API_TYPE_REFERENCE_MAP_H_
+#ifndef EXTENSIONS_RENDERER_BINDINGS_API_TYPE_REFERENCE_MAP_H_
+#define EXTENSIONS_RENDERER_BINDINGS_API_TYPE_REFERENCE_MAP_H_
 
 #include <map>
 #include <memory>
@@ -72,4 +72,4 @@ class APITypeReferenceMap {
 
 }  // namespace extensions
 
-#endif  // EXTENSIONS_RENDERER_API_TYPE_REFERENCE_MAP_H_
+#endif  // EXTENSIONS_RENDERER_BINDINGS_API_TYPE_REFERENCE_MAP_H_