Use GpuPreferences to avoid directly accessing switches in gpu related code

content/common/gpu/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 "content/common/gpu/gpu_channel_test_common.h"
 
 #include "base/test/test_simple_task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "content/common/gpu/gpu_channel_manager_delegate.h"
 #include "gpu/command_buffer/service/sync_point_manager.h"
@@ skipping 42 matching lines @@
     const AcceleratedSurfaceBuffersSwappedParams& params) {}
 #endif
 
 #if defined(OS_WIN)
 void TestGpuChannelManagerDelegate::SendAcceleratedSurfaceCreatedChildWindow(
     const gfx::PluginWindowHandle& parent_window,
     const gfx::PluginWindowHandle& child_window) {}
 #endif
 
 TestGpuChannelManager::TestGpuChannelManager(
+    const gpu::GpuPreferences& gpu_preferences,
     GpuChannelManagerDelegate* delegate,
     base::SingleThreadTaskRunner* task_runner,
     base::SingleThreadTaskRunner* io_task_runner,
     gpu::SyncPointManager* sync_point_manager,
     GpuMemoryBufferFactory* gpu_memory_buffer_factory)
-    : GpuChannelManager(delegate,
+    : GpuChannelManager(gpu_preferences,
+                        delegate,
                         nullptr,
                         task_runner,
                         io_task_runner,
                         nullptr,
                         sync_point_manager,
                         gpu_memory_buffer_factory) {}
 
 TestGpuChannelManager::~TestGpuChannelManager() {
   // Clear gpu channels here so that any IPC messages sent are handled using the
   // overridden Send method.
@@ skipping 60 matching lines @@
   return sink_.Send(msg);
 }
 
 // TODO(sunnyps): Use a mock memory buffer factory when necessary.
 GpuChannelTestCommon::GpuChannelTestCommon()
     : task_runner_(new base::TestSimpleTaskRunner),
       io_task_runner_(new base::TestSimpleTaskRunner),
       sync_point_manager_(new gpu::SyncPointManager(false)),
       channel_manager_delegate_(new TestGpuChannelManagerDelegate()),
       channel_manager_(
-          new TestGpuChannelManager(channel_manager_delegate_.get(),
+          new TestGpuChannelManager(gpu_preferences_,
+                                    channel_manager_delegate_.get(),
                                     task_runner_.get(),
                                     io_task_runner_.get(),
                                     sync_point_manager_.get(),
                                     nullptr)) {}
 
 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 content