content: Move Surfaces related code out of RWHVA.

ui/android/delegated_frame_host_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 UI_ANDROID_DELEGATED_FRAME_HOST_ANDROID_H_
+#define UI_ANDROID_DELEGATED_FRAME_HOST_ANDROID_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "cc/resources/returned_resource.h"
+#include "cc/surfaces/surface_factory.h"
+#include "cc/surfaces/surface_factory_client.h"
+#include "ui/android/ui_android_export.h"
+#include "ui/gfx/selection_bound.h"
+
+namespace cc {
+
+class CompositorFrame;
+class Layer;
+class SurfaceId;
+class SurfaceManager;
+class SurfaceLayer;
+class SurfaceIdAllocator;
+enum class SurfaceDrawStatus;
+
+}  // namespace cc
+
+namespace ui {
+class ViewAndroid;
+
+class UI_ANDROID_EXPORT DelegatedFrameHostAndroid
+    : public cc::SurfaceFactoryClient {
+ public:
+  using ReturnResourcesCallback =
+      base::Callback<void(const cc::ReturnedResourceArray&)>;
+
+  DelegatedFrameHostAndroid(ViewAndroid* view,
+                            SkColor background_color,
+                            ReturnResourcesCallback return_resources_callback);
+
+  ~DelegatedFrameHostAndroid();
+
+  void SubmitCompositorFrame(cc::CompositorFrame frame,
+                             cc::SurfaceFactory::DrawCallback draw_callback);
+
+  void DestroyDelegatedContent();
+
+  uint32_t GetSurfaceClientId() const;
+
+  // Should only be called when the host has a content layer.
+  void RequestCopyOfSurface(
+      std::unique_ptr<cc::CopyOutputRequest> copy_output_request);
+
+  void OutputSurfaceChanged();
+
+  void UpdateBackgroundColor(SkColor color);
+
+  void UpdateSize(const gfx::Size& desired_content_size);

[no sievers, 2016/08/12 19:33:04]

nit: can you call this 'UpdateContainerSize()'?

[Khushal, 2016/08/16 01:34:23]

Done.

+
+  // Returns the layer holding the content from the renderer. Can be null.
+  cc::Layer* GetContentLayer() const;
+
+ private:
+  // cc::SurfaceFactoryClient implementation.
+  void ReturnResources(const cc::ReturnedResourceArray& resources) override;
+  void SetBeginFrameSource(cc::BeginFrameSource* begin_frame_source) override;
+
+  void CreateContentLayer();
+  void DestroyContentLayer();
+
+  void UpdateBackgroundLayer();
+
+  ViewAndroid* view_;
+
+  cc::SurfaceManager* surface_manager_;
+  std::unique_ptr<cc::SurfaceIdAllocator> surface_id_allocator_;
+  ReturnResourcesCallback return_resources_callback_;
+
+  std::unique_ptr<cc::SurfaceFactory> surface_factory_;
+  cc::SurfaceId surface_id_;
+  gfx::Size current_surface_size_;
+  gfx::Vector2dF location_bar_content_translation_;
+  cc::Selection<gfx::SelectionBound> current_viewport_selection_;
+
+  scoped_refptr<cc::SurfaceLayer> content_layer_;
+
+  scoped_refptr<cc::Layer> background_layer_;
+
+  gfx::Size desired_content_size_;
+
+  DISALLOW_COPY_AND_ASSIGN(DelegatedFrameHostAndroid);
+};
+
+}  // namespace ui
+
+#endif  // UI_ANDROID_DELEGATED_FRAME_HOST_ANDROID_H_