[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/web_request_hooks.cc

 // Copyright 2017 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/web_request_hooks.h"
 
 #include "base/values.h"
 #include "content/public/child/v8_value_converter.h"
 #include "extensions/common/extension_api.h"
-#include "extensions/renderer/api_binding_hooks.h"
+#include "extensions/renderer/bindings/api_binding_hooks.h"
 #include "extensions/renderer/module_system.h"
 #include "extensions/renderer/script_context.h"
 #include "extensions/renderer/script_context_set.h"
 #include "gin/converter.h"
 
 namespace extensions {
 
 WebRequestHooks::WebRequestHooks() {}
 WebRequestHooks::~WebRequestHooks() = default;
 
@@ skipping 47 matching lines @@
       v8::Undefined(isolate),  // opt_argSchemas are ignored.
       extra_parameters_spec,
       // opt_eventOptions and opt_webViewInstanceId are ignored.
   };
   *event_out =
       run_js_sync.Run(get_event, context, arraysize(args), args).Get(isolate);
   return true;
 }
 
 }  // namespace extensions