vulkan: fix release build

gpu/vulkan/vulkan_implementation.cc

 // Copyright (c) 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.
 
 #include "gpu/vulkan/vulkan_implementation.h"
 
 #include <unordered_set>
 #include <vector>
 #include "base/logging.h"
 #include "base/macros.h"
@@ skipping 113 matching lines @@
     instance_create_info.ppEnabledLayerNames = enabled_layer_names.data();
     instance_create_info.enabledExtensionCount = enabled_ext_names.size();
     instance_create_info.ppEnabledExtensionNames = enabled_ext_names.data();
 
     result = vkCreateInstance(&instance_create_info, nullptr, &vk_instance);
     if (VK_SUCCESS != result) {
       DLOG(ERROR) << "vkCreateInstance() failed: " << result;
       return false;
     }
 
+#if DCHECK_IS_ON()
     // Register our error logging function.
     if (debug_report_enabled) {
       PFN_vkCreateDebugReportCallbackEXT vkCreateDebugReportCallbackEXT =
           reinterpret_cast<PFN_vkCreateDebugReportCallbackEXT>
               (vkGetInstanceProcAddr(vk_instance,
                                      "vkCreateDebugReportCallbackEXT"));
       DCHECK(vkCreateDebugReportCallbackEXT);
 
       VkDebugReportCallbackCreateInfoEXT cb_create_info = {};
       cb_create_info.sType = VK_STRUCTURE_TYPE_DEBUG_REPORT_CREATE_INFO_EXT;
@@ skipping 12 matching lines @@
                              VK_DEBUG_REPORT_PERFORMANCE_WARNING_BIT_EXT;
       cb_create_info.pfnCallback = &VulkanWarningCallback;
       result = vkCreateDebugReportCallbackEXT(vk_instance, &cb_create_info,
                                               nullptr, &warning_callback);
       if (VK_SUCCESS != result) {
         DLOG(ERROR) << "vkCreateDebugReportCallbackEXT(WARN) failed: "
                     << result;
         return false;
       }
     }
+#endif
 
     return true;
   }
 
   bool valid = false;
   VkInstance vk_instance = VK_NULL_HANDLE;
 #if DCHECK_IS_ON()
   VkDebugReportCallbackEXT error_callback = VK_NULL_HANDLE;
   VkDebugReportCallbackEXT warning_callback = VK_NULL_HANDLE;
 #endif
 };
 
 static VulkanInstance* vulkan_instance = nullptr;
 
 bool InitializeVulkan() {
   DCHECK(!vulkan_instance);
   vulkan_instance = new VulkanInstance;
   vulkan_instance->Initialize();
   return vulkan_instance->valid;
 }
 
 VkInstance GetVulkanInstance() {
   DCHECK(vulkan_instance);
   DCHECK(vulkan_instance->valid);
   return vulkan_instance->vk_instance;
 }
 
 }  // namespace gpu