Adds resource_provider::ResourceProvider

components/resource_provider/resource_provider_impl.h

+// 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 COMPONENTS_RESOURCE_PROVIDER_RESOURCE_PROVIDER_IMPL_H_
+#define COMPONENTS_RESOURCE_PROVIDER_RESOURCE_PROVIDER_IMPL_H_
+
+#include "base/files/file_path.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/weak_ptr.h"
+#include "components/resource_provider/public/interfaces/resource_provider.mojom.h"
+
+namespace base {
+class SequencedWorkerPool;
+}
+
+namespace resource_provider {
+
+// ResourceProvider implementation that loads resources in background threads.
+class ResourceProviderImpl : public resource_provider::ResourceProvider {
+ public:
+  ResourceProviderImpl(const base::FilePath& application_path,
+                       base::SequencedWorkerPool* blocking_pool);
+  ~ResourceProviderImpl() override;
+
+ private:
+  struct Data;
+
+  static void ReadFileOnWorkerThread(const base::FilePath& path,
+                                     scoped_refptr<Data> data);
+  void OnReadFile(scoped_refptr<Data> data,
+                  const GetResourceCallback& callback);
+
+  void GetResource(const mojo::String& path,
+                   const GetResourceCallback& callback) override;
+
+  const base::FilePath application_path_;
+
+  scoped_refptr<base::SequencedWorkerPool> blocking_pool_;
+
+  base::WeakPtrFactory<ResourceProviderImpl> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ResourceProviderImpl);
+};
+
+}  // namespace resource_provider
+
+#endif  // COMPONENTS_RESOURCE_PROVIDER_RESOURCE_PROVIDER_IMPL_H_