Make Mac swap code like other platforms

gpu/ipc/service/gpu_channel_test_common.cc

 // Copyright (c) 2015 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.
 
 #include "gpu/ipc/service/gpu_channel_test_common.h"
 
 #include "base/memory/ptr_util.h"
 #include "base/test/test_simple_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "gpu/command_buffer/service/sync_point_manager.h"
@@ skipping 23 matching lines @@
     const GURL& active_url) {}
 
 void TestGpuChannelManagerDelegate::GpuMemoryUmaStats(
     const GPUMemoryUmaStats& params) {}
 
 void TestGpuChannelManagerDelegate::StoreShaderToDisk(
     int32_t client_id,
     const std::string& key,
     const std::string& shader) {}
 
-#if defined(OS_MACOSX)
-void TestGpuChannelManagerDelegate::SendAcceleratedSurfaceBuffersSwapped(
-    gpu::SurfaceHandle surface_handle,
-    CAContextID ca_context_id,
-    bool fullscreen_low_power_ca_context_valid,
-    CAContextID fullscreen_low_power_ca_context_id,
-    const gfx::ScopedRefCountedIOSurfaceMachPort& io_surface,
-    const gfx::Size& size,
-    float scale_factor,
-    std::vector<ui::LatencyInfo> latency_info) {}
-#endif
-
 #if defined(OS_WIN)
 void TestGpuChannelManagerDelegate::SendAcceleratedSurfaceCreatedChildWindow(
     SurfaceHandle parent_window,
     SurfaceHandle child_window) {}
 #endif
 
 TestGpuChannelManager::TestGpuChannelManager(
     const GpuPreferences& gpu_preferences,
     GpuChannelManagerDelegate* delegate,
     base::SingleThreadTaskRunner* task_runner,
@@ skipping 91 matching lines @@
 
 GpuChannelTestCommon::~GpuChannelTestCommon() {
   // Destroying channels causes tasks to run on the IO task runner.
   channel_manager_ = nullptr;
   // Clear pending tasks to avoid refptr cycles that get flagged by ASAN.
   task_runner_->ClearPendingTasks();
   io_task_runner_->ClearPendingTasks();
 }
 
 }  // namespace gpu