Update Context Client Visibility to use Scoped Pattern

cc/output/gl_renderer.h

 // Copyright 2010 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 CC_OUTPUT_GL_RENDERER_H_
 #define CC_OUTPUT_GL_RENDERER_H_
 
 #include <deque>
 #include <vector>
 
 #include "base/cancelable_callback.h"
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 #include "cc/output/color_lut_cache.h"
 #include "cc/output/direct_renderer.h"
 #include "cc/output/gl_renderer_draw_cache.h"
 #include "cc/output/program_binding.h"
 #include "cc/output/renderer_capabilities_impl.h"
 #include "cc/quads/debug_border_draw_quad.h"
 #include "cc/quads/render_pass_draw_quad.h"
 #include "cc/quads/solid_color_draw_quad.h"
 #include "cc/quads/tile_draw_quad.h"
 #include "cc/quads/yuv_video_draw_quad.h"
+#include "gpu/command_buffer/client/context_support.h"
 #include "ui/gfx/geometry/quad_f.h"
 
 class SkBitmap;
 
 namespace gpu {
 namespace gles2 {
 class GLES2Interface;
 }
 }
 
@@ skipping 228 matching lines @@
       const CALayerOverlay* ca_layer_overlay,
       Resource** resource,
       DrawingFrame* frame,
       gfx::RectF* new_bounds);
 
   // Schedules the |ca_layer_overlay|, which is guaranteed to have a non-null
   // |rpdq| parameter.
   void ScheduleRenderPassDrawQuad(const CALayerOverlay* ca_layer_overlay,
                                   DrawingFrame* external_frame);
 
+  void UpdateVisibilityForContextProvider(bool is_visible);
+
   using OverlayResourceLock =
       std::unique_ptr<ResourceProvider::ScopedReadLockGL>;
   using OverlayResourceLockList = std::vector<OverlayResourceLock>;
 
   // Resources that have been sent to the GPU process, but not yet swapped.
   OverlayResourceLockList pending_overlay_resources_;
 
   // Resources that should be shortly swapped by the GPU process.
   std::deque<OverlayResourceLockList> swapping_overlay_resources_;
 
@@ skipping 255 matching lines @@
 
   // The method FlippedFramebuffer determines whether the framebuffer associated
   // with a DrawingFrame is flipped. It makes the assumption that the
   // DrawingFrame is being used as part of a render pass. If a DrawingFrame is
   // not being used as part of a render pass, setting it here forces
   // FlippedFramebuffer to return |true|.
   bool force_drawing_frame_framebuffer_unflipped_ = false;
 
   BoundGeometry bound_geometry_;
   ColorLUTCache color_lut_cache_;
+
+  std::unique_ptr<gpu::ContextSupport::ScopedVisibility>
+      context_client_visibility_;
   DISALLOW_COPY_AND_ASSIGN(GLRenderer);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_GL_RENDERER_H_