[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/web_request_hooks.h

 // 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.
 
 #ifndef EXTENSIONS_RENDERER_WEB_REQUEST_HOOKS_H_
 #define EXTENSIONS_RENDERER_WEB_REQUEST_HOOKS_H_
 
 #include <string>
 
 #include "base/macros.h"
-#include "extensions/renderer/api_binding_hooks_delegate.h"
-#include "extensions/renderer/api_binding_types.h"
+#include "extensions/renderer/bindings/api_binding_hooks_delegate.h"
+#include "extensions/renderer/bindings/api_binding_types.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
 // Custom hooks for the WebRequest API.
 class WebRequestHooks : public APIBindingHooksDelegate {
  public:
   WebRequestHooks();
   ~WebRequestHooks() override;
 
   // APIBindingHooksDelegate:
   // Creates a new WebRequest event.
   // TODO(devlin): WebRequest events are a very unfortunate implementation
   // detail, but refactoring means changing a few parts of the internal API.
   // It's not impossible, but it's a bit involved. However, as we move more
   // towards native bindings, it's definitely something we'll want to do.
   bool CreateCustomEvent(v8::Local<v8::Context> context,
                          const binding::RunJSFunctionSync& run_js_sync,
                          const std::string& event_name,
                          v8::Local<v8::Value>* event_out) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebRequestHooks);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_WEB_REQUEST_HOOKS_H_