Mac: Clean up visibility state tracking

content/browser/renderer_host/browser_compositor_view_mac.h

 // Copyright 2014 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_BROWSER_COMPOSITOR_VIEW_MAC_H_
 #define CONTENT_BROWSER_RENDERER_HOST_BROWSER_COMPOSITOR_VIEW_MAC_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "content/browser/renderer_host/delegated_frame_host.h"
 #include "ui/compositor/compositor.h"
 #include "ui/compositor/compositor_observer.h"
 
 namespace ui {
 class AcceleratedWidgetMac;
 class AcceleratedWidgetMacNSView;
 }
 
 namespace content {
 
 class RecyclableCompositorMac;
 
 class BrowserCompositorMacClient {
  public:
   virtual NSView* BrowserCompositorMacGetNSView() const = 0;
-  virtual bool BrowserCompositorMacIsVisible() const = 0;
   virtual SkColor BrowserCompositorMacGetGutterColor(SkColor color) const = 0;
   virtual void BrowserCompositorMacSendCompositorSwapAck(
       int output_surface_id,
       const cc::CompositorFrameAck& ack) = 0;
   virtual void BrowserCompositorMacSendReclaimCompositorResources(
       int output_surface_id,
       const cc::CompositorFrameAck& ack) = 0;
   virtual void BrowserCompositorMacOnLostCompositorResources() = 0;
   virtual void BrowserCompositorMacUpdateVSyncParameters(
       const base::TimeTicks& timebase,
@@ skipping 153 matching lines @@
   cc::BeginFrameSource* begin_frame_source_ = nullptr;
   cc::BeginFrameArgs last_begin_frame_args_;
   bool needs_begin_frames_ = false;
 
   base::WeakPtrFactory<BrowserCompositorMac> weak_factory_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_BROWSER_COMPOSITOR_VIEW_MAC_H_