Add unittest to avoid duplicate id in gpu driver bug list

gpu/config/gpu_control_list.cc

 // Copyright (c) 2013 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_control_list.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 1562 matching lines @@
     problem->SetString("tag", tag);
 
     problem_list->Append(std::move(problem));
   }
 }
 
 size_t GpuControlList::num_entries() const {
   return entries_.size();
 }
 
+bool GpuControlList::has_duplicate_entry_id() const {
+  std::set<int> ids;
+  for (size_t i = 0; i < entries_.size(); ++i) {
+    if (ids.count(entries_[i]->id()) == 0)
+      ids.insert(entries_[i]->id());
+    else
+      return true;
+  }
+  return false;
+}
+
 uint32_t GpuControlList::max_entry_id() const {
   return max_entry_id_;
 }
 
 std::string GpuControlList::version() const {
   return version_;
 }
 
 GpuControlList::OsType GpuControlList::GetOsType() {
 #if defined(OS_CHROMEOS)
@@ skipping 41 matching lines @@
     const std::string& feature_name, int feature_id) {
   feature_map_[feature_name] = feature_id;
 }
 
 void GpuControlList::set_supports_feature_type_all(bool supported) {
   supports_feature_type_all_ = supported;
 }
 
 }  // namespace gpu