[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_binding_bridge.h

Index: extensions/renderer/bindings/api_binding_bridge.h
diff --git a/extensions/renderer/api_binding_bridge.h b/extensions/renderer/bindings/api_binding_bridge.h
similarity index 88%
rename from extensions/renderer/api_binding_bridge.h
rename to extensions/renderer/bindings/api_binding_bridge.h
index 32f1238ae432f90102ba7d4b4442393ad9069c4f..298e15eea7bc3cfd7a1686b6a6e52c7e668fe27d 100644
--- a/extensions/renderer/api_binding_bridge.h
+++ b/extensions/renderer/bindings/api_binding_bridge.h
@@ -2,13 +2,13 @@
 // 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_BRIDGE_H_
-#define EXTENSIONS_RENDERER_API_BINDING_BRIDGE_H_
+#ifndef EXTENSIONS_RENDERER_BINDINGS_API_BINDING_BRIDGE_H_
+#define EXTENSIONS_RENDERER_BINDINGS_API_BINDING_BRIDGE_H_
 
 #include <string>
 
 #include "base/macros.h"
-#include "extensions/renderer/api_binding_types.h"
+#include "extensions/renderer/bindings/api_binding_types.h"
 #include "gin/wrappable.h"
 #include "v8/include/v8.h"
 
@@ -60,4 +60,4 @@ class APIBindingBridge final : public gin::Wrappable<APIBindingBridge> {
 
 }  // namespace extensions
 
-#endif  // EXTENSIONS_RENDERER_API_BINDING_BRIDGE_H_
+#endif  // EXTENSIONS_RENDERER_BINDINGS_API_BINDING_BRIDGE_H_