content: Add ContextProviderFactory to create a render ContextProvider.

content/browser/renderer_host/context_provider_factory_impl_android.h

+// Copyright 2016 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_BROWSER_RENDERER_HOST_CONTEXT_PROVIDER_FACTORY_IMPL_ANDROID_H_
+#define CONTENT_BROWSER_RENDERER_HOST_CONTEXT_PROVIDER_FACTORY_IMPL_ANDROID_H_
+
+#include <list>
+
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "base/timer/timer.h"
+#include "content/common/content_export.h"
+#include "content/common/gpu/client/command_buffer_metrics.h"
+#include "gpu/command_buffer/client/shared_memory_limits.h"
+#include "gpu/command_buffer/common/gles2_cmd_utils.h"
+#include "gpu/ipc/common/surface_handle.h"
+#include "ui/android/context_provider_factory.h"
+
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}
+
+namespace cc {
+class VulkanInProcessContextProvider;
+}
+
+namespace gpu {
+class GpuChannelHost;
+}
+
+namespace content {
+class ContextProviderCommandBuffer;
+
+class CONTENT_EXPORT ContextProviderFactoryImpl
+    : public ui::ContextProviderFactory {
+ public:
+  static ContextProviderFactoryImpl* GetInstance();
+
+  ~ContextProviderFactoryImpl() override;
+
+  // The callback may be triggered synchronously, if the Gpu Channel is already
+  // initialized. In case the surface_handle is invalidated before the context
+  // can be created, the request is dropped and the callback will *not* run.
+  void CreateDisplayContextProvider(
+      gpu::SurfaceHandle surface_handle,
+      gpu::SharedMemoryLimits shared_memory_limits,
+      gpu::gles2::ContextCreationAttribHelper attributes,
+      bool support_locking,
+      bool automatic_flushes,
+      ContextProviderCallback result_callback);
+
+  // ContextProviderFactory implementation.
+  scoped_refptr<cc::VulkanContextProvider> GetSharedVulkanContextProvider()
+      override;
+  void CreateOffscreenContextProvider(
+      ContextType context_type,
+      gpu::SharedMemoryLimits shared_memory_limits,
+      gpu::gles2::ContextCreationAttribHelper attributes,
+      bool support_locking,
+      bool automatic_flushes,
+      cc::ContextProvider* shared_context_provider,
+      ContextProviderCallback result_callback) override;
+  cc::SurfaceManager* GetSurfaceManager() override;
+  uint32_t AllocateSurfaceClientId() override;
+  cc::SharedBitmapManager* GetSharedBitmapManager() override;
+  gpu::GpuMemoryBufferManager* GetGpuMemoryBufferManager() override;
+
+ private:
+  friend struct base::DefaultSingletonTraits<ContextProviderFactoryImpl>;
+
+  void CreateContextProviderInternal(
+      command_buffer_metrics::ContextType context_type,
+      gpu::SurfaceHandle surface_handle,
+      gpu::SharedMemoryLimits shared_memory_limits,
+      gpu::gles2::ContextCreationAttribHelper attributes,
+      bool support_locking,
+      bool automatic_flushes,
+      cc::ContextProvider* shared_context_provider,
+      ContextProviderCallback result_callback);
+
+  struct ContextProvidersRequest {
+    ContextProvidersRequest();
+    ContextProvidersRequest(const ContextProvidersRequest& other);
+    ~ContextProvidersRequest();
+
+    command_buffer_metrics::ContextType context_type;
+    gpu::SurfaceHandle surface_handle;
+    gpu::SharedMemoryLimits shared_memory_limits;
+    gpu::gles2::ContextCreationAttribHelper attributes;
+    bool support_locking;
+    bool automatic_flushes;
+    cc::ContextProvider* shared_context_provider;
+    ContextProviderCallback result_callback;
+  };
+
+  ContextProviderFactoryImpl();
+
+  // Will return nullptr if the Gpu channel has not been established.
+  gpu::GpuChannelHost* EnsureGpuChannelEstablished();
+  void OnGpuChannelEstablished();
+  void OnGpuChannelTimeout();
+
+  void HandlePendingRequests();
+
+  std::list<ContextProvidersRequest> context_provider_requests_;
+
+  scoped_refptr<ContextProviderCommandBuffer> shared_worker_context_provider_;
+
+  scoped_refptr<cc::VulkanContextProvider> shared_vulkan_context_provider_;
+
+  bool in_handle_pending_requests_;
+
+  base::OneShotTimer establish_gpu_channel_timeout_;
+
+  std::unique_ptr<cc::SurfaceManager> surface_manager_;
+  int surface_client_id_;
+
+  base::WeakPtrFactory<ContextProviderFactoryImpl> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContextProviderFactoryImpl);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_CONTEXT_PROVIDER_FACTORY_IMPL_ANDROID_H_