[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/native_extension_bindings_system.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "extensions/renderer/native_extension_bindings_system.h"
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
 #include "content/public/common/console_message_level.h"
 #include "content/public/common/content_switches.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/event_filtering_info.h"
 #include "extensions/common/extension_api.h"
 #include "extensions/common/extension_messages.h"
 #include "extensions/common/features/feature_provider.h"
-#include "extensions/renderer/api_binding_bridge.h"
-#include "extensions/renderer/api_binding_hooks.h"
-#include "extensions/renderer/api_binding_js_util.h"
+#include "extensions/renderer/bindings/api_binding_bridge.h"
+#include "extensions/renderer/bindings/api_binding_hooks.h"
+#include "extensions/renderer/bindings/api_binding_js_util.h"
 #include "extensions/renderer/chrome_setting.h"
 #include "extensions/renderer/console.h"
 #include "extensions/renderer/content_setting.h"
 #include "extensions/renderer/declarative_content_hooks_delegate.h"
 #include "extensions/renderer/module_system.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/script_context_set.h"
 #include "extensions/renderer/storage_area.h"
 #include "extensions/renderer/web_request_hooks.h"
 #include "gin/converter.h"
@@ skipping 666 matching lines @@
     v8::Local<v8::Value>* binding_util_out) {
   gin::Handle<APIBindingJSUtil> handle = gin::CreateHandle(
       context->GetIsolate(),
       new APIBindingJSUtil(
           api_system_.type_reference_map(), api_system_.request_handler(),
           api_system_.event_handler(), base::Bind(&CallJsFunction)));
   *binding_util_out = handle.ToV8();
 }
 
 }  // namespace extensions