[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/declarative_content_hooks_delegate.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_DECLARATIVE_CONTENT_HOOKS_DELEGATE_H_
 #define EXTENSIONS_RENDERER_DECLARATIVE_CONTENT_HOOKS_DELEGATE_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
-#include "extensions/renderer/api_binding_hooks_delegate.h"
+#include "extensions/renderer/bindings/api_binding_hooks_delegate.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 class APITypeReferenceMap;
 class ArgumentSpec;
 
 // Custom hooks for the declarativeContent API.
 class DeclarativeContentHooksDelegate : public APIBindingHooksDelegate {
  public:
   // The callback type for handling an API call.
@@ skipping 17 matching lines @@
   // are passed to v8::External, we need to use unique_ptrs rather than just
   // storing the callback directly in a vector.
   std::vector<std::unique_ptr<HandlerCallback>> callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(DeclarativeContentHooksDelegate);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_DECLARATIVE_CONTENT_HOOKS_DELEGATE_H_