| // 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. |
| base::string16 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(); |
| |
| scoped_refptr<content::GpuFeatureChecker> webgl_checker_; |
| |
| ResultCallback callback_; |
| Errors errors_; |
| |
| base::WeakPtrFactory<RequirementsChecker> weak_ptr_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(RequirementsChecker); |
| }; |
| |
| } // namespace extensions |
| |
| #endif // EXTENSIONS_BROWSER_REQUIREMENTS_CHECKER_H_ |