Mac: Clean up ifdefs in output surface

content/browser/compositor/gpu_output_surface_mac.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 CONTENT_BROWSER_COMPOSITOR_GPU_OUTPUT_SURFACE_MAC_H_
+#define CONTENT_BROWSER_COMPOSITOR_GPU_OUTPUT_SURFACE_MAC_H_
+
+#include "content/browser/compositor/gpu_surfaceless_browser_compositor_output_surface.h"
+
+namespace content {
+
+class GpuOutputSurfaceMac
+    : public GpuSurfacelessBrowserCompositorOutputSurface {
+ public:
+  GpuOutputSurfaceMac(
+      scoped_refptr<ContextProviderCommandBuffer> context,
+      gpu::SurfaceHandle surface_handle,
+      scoped_refptr<ui::CompositorVSyncManager> vsync_manager,
+      base::SingleThreadTaskRunner* task_runner,
+      std::unique_ptr<display_compositor::CompositorOverlayCandidateValidator>
+          overlay_candidate_validator,
+      gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager);
+  ~GpuOutputSurfaceMac() override;
+
+  // cc::OutputSurface implementation.
+  void SwapBuffers(cc::CompositorFrame* frame) override;
+  bool SurfaceIsSuspendForRecycle() const override;
+
+  // BrowserCompositorOutputSurface implementation.
+  void OnGpuSwapBuffersCompleted(
+      const std::vector<ui::LatencyInfo>& latency_info,
+      gfx::SwapResult result,
+      const gpu::GpuProcessHostedCALayerTreeParamsMac* params_mac) override;
+  void SetSurfaceSuspendedForRecycle(bool suspended) override;
+
+ private:
+  enum ShouldShowFramesState {
+    // Frames that come from the GPU process should appear on-screen.
+    SHOULD_SHOW_FRAMES,
+    // The compositor has been suspended. Any frames that come from the GPU
+    // process are for the pre-suspend content and should not be displayed.
+    SHOULD_NOT_SHOW_FRAMES_SUSPENDED,
+    // The compositor has been un-suspended, but has not yet issued a swap
+    // since being un-suspended, so any frames that come from the GPU process
+    // are for pre-suspend content and should not be displayed.
+    SHOULD_NOT_SHOW_FRAMES_NO_SWAP_AFTER_SUSPENDED,
+  };
+  ShouldShowFramesState should_show_frames_state_ = SHOULD_SHOW_FRAMES;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuOutputSurfaceMac);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_COMPOSITOR_GPU_OUTPUT_SURFACE_MAC_H_