Cleanup SurfaceVisibility code.

gpu/command_buffer/client/context_support.h

 // Copyright 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 GPU_COMMAND_BUFFER_CLIENT_CONTEXT_SUPPORT_H_
 #define GPU_COMMAND_BUFFER_CLIENT_CONTEXT_SUPPORT_H_
 
 #include "base/callback.h"
 #include "ui/gfx/overlay_transform.h"
 
@@ skipping 13 matching lines @@
                                const base::Closure& callback) = 0;
 
   // Runs |callback| when a sync token is signalled.
   virtual void SignalSyncToken(const SyncToken& sync_token,
                                const base::Closure& callback) = 0;
 
   // Runs |callback| when a query created via glCreateQueryEXT() has cleared
   // passed the glEndQueryEXT() point.
   virtual void SignalQuery(uint32 query, const base::Closure& callback) = 0;
 
-  // For onscreen contexts, indicates that the surface visibility has changed.
-  // Clients aren't expected to draw to an invisible surface.
-  virtual void SetSurfaceVisible(bool visible) = 0;
-
   // Indicates whether the context should aggressively free allocated resources.
   // If set to true, the context will purge all temporary resources when
   // flushed.
   virtual void SetAggressivelyFreeResources(
       bool aggressively_free_resources) = 0;
 
   virtual void Swap() = 0;
   virtual void PartialSwapBuffers(const gfx::Rect& sub_buffer) = 0;
 
   // Schedule a texture to be presented as an overlay synchronously with the
@@ skipping 13 matching lines @@
   virtual uint64_t ShareGroupTracingGUID() const = 0;
 
  protected:
   ContextSupport() {}
   virtual ~ContextSupport() {}
 };
 
 }
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_CONTEXT_SUPPORT_H_