[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/bindings/declarative_event.cc

Index: extensions/renderer/bindings/declarative_event.cc
diff --git a/extensions/renderer/declarative_event.cc b/extensions/renderer/bindings/declarative_event.cc
similarity index 95%
rename from extensions/renderer/declarative_event.cc
rename to extensions/renderer/bindings/declarative_event.cc
index 531b1117eec0b9c4ec6d779eed50594570b16aaf..29e60ab51bd4828d2352a7d5fffd7e224f977ae6 100644
--- a/extensions/renderer/declarative_event.cc
+++ b/extensions/renderer/bindings/declarative_event.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "extensions/renderer/declarative_event.h"
+#include "extensions/renderer/bindings/declarative_event.h"
 
 #include <algorithm>
 #include <memory>
@@ -10,11 +10,11 @@
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/values.h"
-#include "extensions/renderer/api_event_listeners.h"
-#include "extensions/renderer/api_request_handler.h"
-#include "extensions/renderer/api_signature.h"
-#include "extensions/renderer/api_type_reference_map.h"
-#include "extensions/renderer/argument_spec.h"
+#include "extensions/renderer/bindings/api_event_listeners.h"
+#include "extensions/renderer/bindings/api_request_handler.h"
+#include "extensions/renderer/bindings/api_signature.h"
+#include "extensions/renderer/bindings/api_type_reference_map.h"
+#include "extensions/renderer/bindings/argument_spec.h"
 #include "gin/object_template_builder.h"
 #include "gin/per_context_data.h"