text: // 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 CONTENT_PUBLIC_BROWSER_GPU_FEATURE_CHECKER_H_
  #define CONTENT_PUBLIC_BROWSER_GPU_FEATURE_CHECKER_H_
  
  #include "base/callback_forward.h"
  #include "base/memory/ref_counted.h"
  #include "content/common/content_export.h"
  #include "gpu/config/gpu_feature_type.h"
  
  namespace content {
  
  class GpuFeatureChecker : public base::RefCountedThreadSafe<GpuFeatureChecker> {
   public:
    typedef base::Callback<void(bool feature_available)> FeatureAvailableCallback;
  
    CONTENT_EXPORT static scoped_refptr<GpuFeatureChecker> Create(
        gpu::GpuFeatureType feature,
        FeatureAvailableCallback callback);
  
    // Checks to see if |feature_| is available on the current GPU. |callback_|
    // will be called to indicate the availability of the feature. Must be called
    // from the the UI thread.
    virtual void CheckGpuFeatureAvailability() = 0;
  
   protected:
    friend class base::RefCountedThreadSafe<GpuFeatureChecker>;
  
    virtual ~GpuFeatureChecker();
  };
  
  }  // namespace content
  
  #endif  // CONTENT_PUBLIC_BROWSER_GPU_FEATURE_CHECKER_H_
  