[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_request_handler.h

Index: extensions/renderer/bindings/api_request_handler.h
diff --git a/extensions/renderer/api_request_handler.h b/extensions/renderer/bindings/api_request_handler.h
similarity index 93%
rename from extensions/renderer/api_request_handler.h
rename to extensions/renderer/bindings/api_request_handler.h
index 10ede6877ee41e90c25c68e55294ae0923375ad6..c395aa7a605be475b9b961087e916d8b5dc3df76 100644
--- a/extensions/renderer/api_request_handler.h
+++ b/extensions/renderer/bindings/api_request_handler.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_REQUEST_HANDLER_H_
-#define EXTENSIONS_RENDERER_API_REQUEST_HANDLER_H_
+#ifndef EXTENSIONS_RENDERER_BINDINGS_API_REQUEST_HANDLER_H_
+#define EXTENSIONS_RENDERER_BINDINGS_API_REQUEST_HANDLER_H_
 
 #include <map>
 #include <memory>
@@ -11,8 +11,8 @@
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "extensions/renderer/api_binding_types.h"
-#include "extensions/renderer/api_last_error.h"
+#include "extensions/renderer/bindings/api_binding_types.h"
+#include "extensions/renderer/bindings/api_last_error.h"
 #include "third_party/WebKit/public/web/WebUserGestureToken.h"
 #include "v8/include/v8.h"
 
@@ -126,4 +126,4 @@ class APIRequestHandler {
 
 }  // namespace extensions
 
-#endif  // EXTENSIONS_RENDERER_API_REQUEST_HANDLER_H_
+#endif  // EXTENSIONS_RENDERER_BINDINGS_API_REQUEST_HANDLER_H_