Implement the Platform::sharedOffscreenGraphicsContext3D method.

webkit/gpu/test_context_provider_factory.h

+// Copyright (c) 2013 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 WEBKIT_GPU_TEST_CONTEXT_PROVIDER_FACTORY_H_
+#define WEBKIT_GPU_TEST_CONTEXT_PROVIDER_FACTORY_H_
+
+#include "base/memory/ref_counted.h"
+#include "webkit/gpu/webkit_gpu_export.h"
+#include "webkit/support/webkit_support.h"
+
+namespace cc {
+class ContextProvider;
+}
+
+namespace webkit {
+namespace gpu {
+class ContextProviderInProcess;
+
+class WEBKIT_GPU_EXPORT TestContextProviderFactory {
+ public:
+  static void SetUpFactoryForTesting(
+      webkit_support::GraphicsContext3DImplementation implementation);
+
+  // Each call to GetInstance should be matched with a call to DestroyInstance.
+  // SetUpFactoryForTesting() must be called before GetInstance can be called.
+  // The returned pointer is static and should not be deleted by the caller.
+  static TestContextProviderFactory* GetInstance();
+  static void DestroyInstance();
+
+  scoped_refptr<cc::ContextProvider> OffscreenContextProviderForMainThread();
+  scoped_refptr<cc::ContextProvider>
+      OffscreenContextProviderForCompositorThread();
+
+ private:
+  TestContextProviderFactory();
+  ~TestContextProviderFactory();
+
+  scoped_refptr<webkit::gpu::ContextProviderInProcess> main_thread_;
+  scoped_refptr<webkit::gpu::ContextProviderInProcess> compositor_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestContextProviderFactory);
+};
+
+}  // namespace gpu
+}  // namespace webkit
+
+#endif  // WEBKIT_GPU_TEST_WEBKIT_CONTEXT_PROVIDER_FACTORY_H_