blimp: Use SwapPromises for readback API.

blimp/client/core/render_widget/blimp_document_manager.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 BLIMP_CLIENT_CORE_RENDER_WIDGET_BLIMP_DOCUMENT_MANAGER_H_
 #define BLIMP_CLIENT_CORE_RENDER_WIDGET_BLIMP_DOCUMENT_MANAGER_H_
 
 #include <map>
 
 #include "base/macros.h"
@@ skipping 23 matching lines @@
       int blimp_contents_id,
       RenderWidgetFeature* render_widget_feature,
       BlimpCompositorDependencies* compositor_dependencies);
   ~BlimpDocumentManager() override;
 
   void SetVisible(bool visible);
   bool visible() const { return visible_; }
 
   bool OnTouchEvent(const ui::MotionEvent& motion_event);
 
-  // Notifies |callback| when all pending commits on the active BlimpCompositor
-  // have been drawn to the screen.  If the active compositor is destroyed or
-  // becomes hidden |callback| will be notified.
-  void NotifyWhenDonePendingCommits(base::Closure callback);
+  void RequestCopyOfCompositorOutput(
+      std::unique_ptr<cc::CopyOutputRequest> copy_request,
+      bool flush_pending_update);
 
   // Sends input event to the engine, virtual for testing.
   virtual void SendWebGestureEvent(int document_id,
                                    const blink::WebGestureEvent& gesture_event);
 
   // Sends compositor message to the engine, virtual for testing.
   virtual void SendCompositorMessage(
       int document_id,
       const cc::proto::CompositorMessage& message);
 
@@ skipping 42 matching lines @@
 
   BlimpCompositorDependencies* compositor_dependencies_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpDocumentManager);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_CORE_RENDER_WIDGET_BLIMP_DOCUMENT_MANAGER_H_