gpu: Unify code to initialize dual-gpu mode.

gpu/config/gpu_util.cc

 // Copyright (c) 2012 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/config/gpu_util.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "gpu/config/gpu_control_list_jsons.h"
 #include "gpu/config/gpu_driver_bug_list.h"
 #include "gpu/config/gpu_info_collector.h"
 #include "gpu/config/gpu_switches.h"
 #include "ui/gl/gl_switches.h"
+#include "ui/gl/gpu_switching_manager.h"
 
 namespace gpu {
 
 namespace {
 
 // Combine the integers into a string, seperated by ','.
 std::string IntSetToString(const std::set<int>& list) {
   std::string rt;
   for (std::set<int>::const_iterator it = list.begin();
        it != list.end(); ++it) {
@@ skipping 108 matching lines @@
   gpu_info->secondary_gpus.clear();
   for (size_t i = 0; i < vendor_ids.size() && i < device_ids.size(); ++i) {
     gpu::GPUInfo::GPUDevice secondary_device;
     secondary_device.active = false;
     secondary_device.vendor_id = vendor_ids[i];
     secondary_device.device_id = device_ids[i];
     gpu_info->secondary_gpus.push_back(secondary_device);
   }
 }
 
+void InitializeDualGpusIfSupported(
+    const std::set<int>& driver_bug_workarounds) {
+  ui::GpuSwitchingManager* switching_manager =
+      ui::GpuSwitchingManager::GetInstance();
+  if (!switching_manager->SupportsDualGpus())
+    return;
+  if (driver_bug_workarounds.count(gpu::FORCE_DISCRETE_GPU) == 1)
+    ui::GpuSwitchingManager::GetInstance()->ForceUseOfDiscreteGpu();
+  else if (driver_bug_workarounds.count(gpu::FORCE_INTEGRATED_GPU) == 1)
+    ui::GpuSwitchingManager::GetInstance()->ForceUseOfIntegratedGpu();
+}
+
 }  // namespace gpu