OnDrawHardware() implementation with async messages

android_webview/browser/browser_view_renderer.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 ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_
 #define ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 112 matching lines @@
                             const gfx::Vector2dF& max_scroll_offset_dip,
                             const gfx::SizeF& scrollable_size_dip,
                             float page_scale_factor,
                             float min_page_scale_factor,
                             float max_page_scale_factor) override;
   void DidOverscroll(content::SynchronousCompositor* compositor,
                      const gfx::Vector2dF& accumulated_overscroll,
                      const gfx::Vector2dF& latest_overscroll_delta,
                      const gfx::Vector2dF& current_fling_velocity) override;
   ui::TouchHandleDrawable* CreateDrawable() override;
+  void OnDrawHardwareProcessFrame(
+      content::SynchronousCompositor::Frame frame) override;
 
   // CompositorFrameProducer overrides
   void OnParentDrawConstraintsUpdated(
       CompositorFrameConsumer* compositor_frame_consumer) override;
   void RemoveCompositorFrameConsumer(
       CompositorFrameConsumer* compositor_frame_consumer) override;
 
   void SetActiveCompositorID(const CompositorID& compositor_id);
 
   // Visible for testing.
   content::SynchronousCompositor* GetActiveCompositorForTesting() const {
     return compositor_;
   }
 
  private:
   void SetTotalRootLayerScrollOffset(const gfx::Vector2dF& new_value_dip);
   bool CanOnDraw();
   bool CompositeSW(SkCanvas* canvas);
   std::unique_ptr<base::trace_event::ConvertableToTraceFormat>
   RootLayerStateAsValue(const gfx::Vector2dF& total_scroll_offset_dip,
                         const gfx::SizeF& scrollable_size_dip);
 
   void ReturnUnusedResource(std::unique_ptr<ChildFrame> frame);
   void ReturnResourceFromParent(
       CompositorFrameConsumer* compositor_frame_consumer);
   void ReleaseHardware();
+  gfx::Rect ComputeViewportRectForTilePriority();
 
   gfx::Vector2d max_scroll_offset() const;
 
   void UpdateMemoryPolicy();
 
   content::SynchronousCompositor* FindCompositor(
       const CompositorID& compositor_id) const;
   // For debug tracing or logging. Return the string representation of this
   // view renderer's state.
   std::string ToString() const;
 
   BrowserViewRendererClient* const client_;
   const scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
+  const bool async_on_draw_hardware_;
   CompositorFrameConsumer* current_compositor_frame_consumer_;
   std::set<CompositorFrameConsumer*> compositor_frame_consumers_;
 
   // The current compositor that's owned by the current RVH.
   content::SynchronousCompositor* compositor_;
   // The process id and routing id of the most recent RVH according to
   // RVHChanged.
   CompositorID compositor_id_;
   // A map from compositor's per-WebView unique ID to the compositor's raw
   // pointer. A raw pointer here is fine because the entry will be erased when
@@ skipping 39 matching lines @@
   gfx::Vector2dF overscroll_rounding_error_;
 
   ParentCompositorDrawConstraints external_draw_constraints_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserViewRenderer);
 };
 
 }  // namespace android_webview
 
 #endif  // ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_H_