[cc] Pass on BeginFrameAcks from CompositorEBFS through RWHVAura, DFH.

content/browser/renderer_host/render_widget_host_view_base.h

 // Copyright (c) 2012 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_RENDER_WIDGET_HOST_VIEW_BASE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 25 matching lines @@
 #include "ui/display/display.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/range/range.h"
 #include "ui/surface/transport_dib.h"
 
 class SkBitmap;
 
 struct ViewHostMsg_SelectionBounds_Params;
 
+namespace cc {
+struct BeginFrameAck;
+}  // namespace cc
+
 namespace media {
 class VideoFrame;
 }
 
 namespace blink {
 class WebMouseEvent;
 class WebMouseWheelEvent;
 }
 
 namespace cc {
@@ skipping 155 matching lines @@
   virtual gfx::AcceleratedWidget AccessibilityGetAcceleratedWidget();
   virtual gfx::NativeViewAccessible AccessibilityGetNativeViewAccessible();
 
   // Informs that the focused DOM node has changed.
   virtual void FocusedNodeChanged(bool is_editable_node,
                                   const gfx::Rect& node_bounds_in_screen) {}
 
   virtual void OnSwapCompositorFrame(uint32_t compositor_frame_sink_id,
                                      cc::CompositorFrame frame) {}
 
+  virtual void OnBeginFrameDidNotSwap(const cc::BeginFrameAck& ack) {}
+
   // This method exists to allow removing of displayed graphics, after a new
   // page has been loaded, to prevent the displayed URL from being out of sync
   // with what is visible on screen.
   virtual void ClearCompositorFrame() = 0;
 
   // Because the associated remote WebKit instance can asynchronously
   // prevent-default on a dispatched touch event, the touch events are queued in
   // the GestureRecognizer until invocation of ProcessAckedTouchEvent releases
   // it to be consumed (when |ack_result| is NOT_CONSUMED OR NO_CONSUMER_EXISTS)
   // or ignored (when |ack_result| is CONSUMED).
@@ skipping 223 matching lines @@
   base::ObserverList<RenderWidgetHostViewBaseObserver> observers_;
 
   base::WeakPtrFactory<RenderWidgetHostViewBase> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_