[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/api_bindings_system.h

Index: extensions/renderer/bindings/api_bindings_system.h
diff --git a/extensions/renderer/api_bindings_system.h b/extensions/renderer/bindings/api_bindings_system.h
similarity index 89%
rename from extensions/renderer/api_bindings_system.h
rename to extensions/renderer/bindings/api_bindings_system.h
index a030371d986f1cfacb37a8ed25b3411a820586c3..dd6d48ef901307b505cd22dbbab8e6bfb11a532c 100644
--- a/extensions/renderer/api_bindings_system.h
+++ b/extensions/renderer/bindings/api_bindings_system.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_BINDINGS_SYSTEM_H_
-#define EXTENSIONS_RENDERER_API_BINDINGS_SYSTEM_H_
+#ifndef EXTENSIONS_RENDERER_BINDINGS_API_BINDINGS_SYSTEM_H_
+#define EXTENSIONS_RENDERER_BINDINGS_API_BINDINGS_SYSTEM_H_
 
 #include <map>
 #include <memory>
@@ -11,13 +11,13 @@
 
 #include "base/callback.h"
 #include "base/macros.h"
-#include "extensions/renderer/api_binding.h"
-#include "extensions/renderer/api_binding_types.h"
-#include "extensions/renderer/api_event_handler.h"
-#include "extensions/renderer/api_last_error.h"
-#include "extensions/renderer/api_request_handler.h"
-#include "extensions/renderer/api_type_reference_map.h"
-#include "extensions/renderer/binding_access_checker.h"
+#include "extensions/renderer/bindings/api_binding.h"
+#include "extensions/renderer/bindings/api_binding_types.h"
+#include "extensions/renderer/bindings/api_event_handler.h"
+#include "extensions/renderer/bindings/api_last_error.h"
+#include "extensions/renderer/bindings/api_request_handler.h"
+#include "extensions/renderer/bindings/api_type_reference_map.h"
+#include "extensions/renderer/bindings/binding_access_checker.h"
 
 namespace base {
 class DictionaryValue;
@@ -146,4 +146,4 @@ class APIBindingsSystem {
 
 }  // namespace
 
-#endif  // EXTENSIONS_RENDERER_API_BINDINGS_SYSTEM_H_
+#endif  // EXTENSIONS_RENDERER_BINDINGS_API_BINDINGS_SYSTEM_H_