[Extensions Bindings] Add a bindings/ subdirectory under renderer

extensions/renderer/api_last_error.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_API_LAST_ERROR_H_
-#define EXTENSIONS_RENDERER_API_LAST_ERROR_H_
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "v8/include/v8.h"
-
-namespace extensions {
-
-// Handles creating and clearing a 'lastError' property to hold the last error
-// set by an extension API function.
-class APILastError {
- public:
-  // Returns the object the 'lastError' property should be exposed on for the
-  // given context.
-  using GetParent =
-      base::Callback<v8::Local<v8::Object>(v8::Local<v8::Context>)>;
-  // Adds an error message to the context's console.
-  using AddConsoleError =
-      base::Callback<void(v8::Local<v8::Context>, const std::string& error)>;
-
-  APILastError(const GetParent& get_parent,
-               const AddConsoleError& add_console_error);
-  APILastError(APILastError&& other);
-  ~APILastError();
-
-  // Sets the last error for the given |context| to |error|.
-  void SetError(v8::Local<v8::Context> context, const std::string& error);
-
-  // Clears the last error in the given |context|. If |report_if_unchecked| is
-  // true and the developer didn't check the error, this throws an exception.
-  void ClearError(v8::Local<v8::Context> context, bool report_if_unchecked);
-
-  // Returns true if the given context has an active error.
-  bool HasError(v8::Local<v8::Context> context);
-
- private:
-  GetParent get_parent_;
-
-  AddConsoleError add_console_error_;
-
-  DISALLOW_COPY_AND_ASSIGN(APILastError);
-};
-
-}  // namespace extensions
-
-#endif  // EXTENSIONS_RENDERER_API_LAST_ERROR_H_