[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_binding_types.h

Index: extensions/renderer/bindings/api_binding_types.h
diff --git a/extensions/renderer/api_binding_types.h b/extensions/renderer/bindings/api_binding_types.h
similarity index 91%
rename from extensions/renderer/api_binding_types.h
rename to extensions/renderer/bindings/api_binding_types.h
index 07aecf87ba375bd2b14ca9053478ece749e2180d..3f2ee53067f8bffe3c88d005a7fcff0d993207ea 100644
--- a/extensions/renderer/api_binding_types.h
+++ b/extensions/renderer/bindings/api_binding_types.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_BINDING_TYPES_H_
-#define EXTENSIONS_RENDERER_API_BINDING_TYPES_H_
+#ifndef EXTENSIONS_RENDERER_BINDINGS_API_BINDING_TYPES_H_
+#define EXTENSIONS_RENDERER_BINDINGS_API_BINDING_TYPES_H_
 
 #include <memory>
 #include <vector>
@@ -52,4 +52,4 @@ using RunJSFunctionSync =
 }  // namespace binding
 }  // namespace extensions
 
-#endif  // EXTENSIONS_RENDERER_API_BINDING_TYPES_H_
+#endif  // EXTENSIONS_RENDERER_BINDINGS_API_BINDING_TYPES_H_