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// Copyright 2015 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_BROWSER_REQUIREMENTS_CHECKER_H_
#define EXTENSIONS_BROWSER_REQUIREMENTS_CHECKER_H_
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/weak_ptr.h"
#include "extensions/browser/preload_check.h"
namespace content {
class GpuFeatureChecker;
}
namespace extensions {
class Extension;
// Validates the 'requirements' extension manifest field. This is an
// asynchronous process that involves several threads, but the public interface
// of this class (including constructor and destructor) must only be used on
// the UI thread.
class RequirementsChecker : public PreloadCheck {
public:
explicit RequirementsChecker(scoped_refptr<const Extension> extension);
~RequirementsChecker() override;
// PreloadCheck:
void Start(ResultCallback callback) override;
// Joins multiple errors into a space-separated string.
std::u16string GetErrorMessage() const override;
private:
// Callback for the GpuFeatureChecker.
void VerifyWebGLAvailability(bool available);
// Helper function to post a task on the UI thread to call RunCallback().
void PostRunCallback();
// Helper function to run the callback.
void RunCallback();
ResultCallback callback_;
Errors errors_;
base::WeakPtrFactory<RequirementsChecker> weak_ptr_factory_{this};
DISALLOW_COPY_AND_ASSIGN(RequirementsChecker);
};
} // namespace extensions
#endif // EXTENSIONS_BROWSER_REQUIREMENTS_CHECKER_H_
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