Remove FrameGenerator::root_window_

services/ui/ws/frame_generator.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 SERVICES_UI_WS_FRAME_GENERATOR_H_
 #define SERVICES_UI_WS_FRAME_GENERATOR_H_
 
 #include <memory>
 
 #include "base/macros.h"
-#include "base/timer/timer.h"
-#include "cc/ipc/display_compositor.mojom.h"
+#include "cc/output/compositor_frame.h"
 #include "cc/output/compositor_frame_sink_client.h"
 #include "cc/scheduler/begin_frame_source.h"
-#include "cc/surfaces/frame_sink_id.h"
-#include "cc/surfaces/local_surface_id_allocator.h"
 #include "cc/surfaces/surface_id.h"
-#include "cc/surfaces/surface_reference.h"
-#include "services/ui/public/interfaces/window_tree_constants.mojom.h"
+#include "cc/surfaces/surface_info.h"
 #include "ui/gfx/geometry/rect.h"
-#include "ui/gfx/native_widget_types.h"
 
 namespace cc {
 class CompositorFrameSink;
 class RenderPass;
 }
 
 namespace ui {
 namespace ws {
 
-class ServerWindow;
-
 // Responsible for redrawing the display in response to the redraw requests by
 // submitting CompositorFrames to the owned CompositorFrameSink.
 class FrameGenerator : public cc::CompositorFrameSinkClient,
                        public cc::BeginFrameObserver {
  public:
-  FrameGenerator(
-      ServerWindow* root_window,
+  explicit FrameGenerator(
       std::unique_ptr<cc::CompositorFrameSink> compositor_frame_sink);
   ~FrameGenerator() override;
 
   void SetDeviceScaleFactor(float device_scale_factor);
   void SetHighContrastMode(bool enabled);
 
   // Updates the WindowManager's SurfaceInfo.
   void OnSurfaceCreated(const cc::SurfaceInfo& surface_info);
 
   void OnWindowDamaged();
+  void OnWindowSizeChanged(const gfx::Size& pixel_size);
 
  private:
   // cc::CompositorFrameSinkClient implementation:
   void SetBeginFrameSource(cc::BeginFrameSource* source) override;
   void ReclaimResources(const cc::ReturnedResourceArray& resources) override;
   void SetTreeActivationCallback(const base::Closure& callback) override;
   void DidReceiveCompositorFrameAck() override;
   void DidLoseCompositorFrameSink() override;
   void OnDraw(const gfx::Transform& transform,
               const gfx::Rect& viewport,
               bool resourceless_software_draw) override;
   void SetMemoryPolicy(const cc::ManagedMemoryPolicy& policy) override;
   void SetExternalTilePriorityConstraints(
       const gfx::Rect& viewport_rect,
       const gfx::Transform& transform) override;
 
   // cc::BeginFrameObserver implementation:
   void OnBeginFrame(const cc::BeginFrameArgs& args) override;
   const cc::BeginFrameArgs& LastUsedBeginFrameArgs() const override;
   void OnBeginFrameSourcePausedChanged(bool paused) override;
 
   // Generates the CompositorFrame.
-  cc::CompositorFrame GenerateCompositorFrame(const gfx::Rect& output_rect);
+  cc::CompositorFrame GenerateCompositorFrame();
 
   // DrawWindow creates SurfaceDrawQuad for the window manager and appends it to
   // the provided cc::RenderPass.
   void DrawWindow(cc::RenderPass* pass);
 
   // SetNeedsBeginFrame sets observing_begin_frames_ and add/remove
   // FrameGenerator as an observer to/from begin_frame_source_ accordingly.
   void SetNeedsBeginFrame(bool needs_begin_frame);
 
-  ServerWindow* const root_window_;
   float device_scale_factor_ = 1.f;
+  gfx::Size pixel_size_;
 
   std::unique_ptr<cc::CompositorFrameSink> compositor_frame_sink_;
   cc::BeginFrameArgs last_begin_frame_args_;
   cc::BeginFrameAck current_begin_frame_ack_;
   cc::BeginFrameSource* begin_frame_source_ = nullptr;
   bool observing_begin_frames_ = false;
   bool high_contrast_mode_enabled_ = false;
 
   cc::SurfaceInfo window_manager_surface_info_;
 
   DISALLOW_COPY_AND_ASSIGN(FrameGenerator);
 };
 
 }  // namespace ws
 
 }  // namespace ui
 
 #endif  // SERVICES_UI_WS_FRAME_GENERATOR_H_