[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_event_handler.h

Index: extensions/renderer/bindings/api_event_handler.h
diff --git a/extensions/renderer/api_event_handler.h b/extensions/renderer/bindings/api_event_handler.h
similarity index 93%
rename from extensions/renderer/api_event_handler.h
rename to extensions/renderer/bindings/api_event_handler.h
index 60a6be55a0f495b9fa565b1c20789021d30892df..4dbd77c3d58f976c560568cf0f749977a011738c 100644
--- a/extensions/renderer/api_event_handler.h
+++ b/extensions/renderer/bindings/api_event_handler.h
@@ -2,16 +2,16 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef EXTENSIONS_RENDERER_API_EVENT_HANDLER_H_
-#define EXTENSIONS_RENDERER_API_EVENT_HANDLER_H_
+#ifndef EXTENSIONS_RENDERER_BINDINGS_API_EVENT_HANDLER_H_
+#define EXTENSIONS_RENDERER_BINDINGS_API_EVENT_HANDLER_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "extensions/common/event_filter.h"
-#include "extensions/renderer/api_binding_types.h"
-#include "extensions/renderer/event_emitter.h"
+#include "extensions/renderer/bindings/api_binding_types.h"
+#include "extensions/renderer/bindings/event_emitter.h"
 #include "v8/include/v8.h"
 
 namespace base {
@@ -109,4 +109,4 @@ class APIEventHandler {
 
 }  // namespace extensions
 
-#endif  // EXTENSIONS_RENDERER_API_EVENT_HANDLER_H_
+#endif  // EXTENSIONS_RENDERER_BINDINGS_API_EVENT_HANDLER_H_