Fixed the crash in Vulkan Shaders in Unit Testing.

gpu/vulkan/vulkan_shader_module.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_shader_module.h"
 
 #include <memory>
 #include <shaderc/shaderc.h>
 #include <sstream>
 
@@ skipping 105 matching lines @@
   if (padding < 4) {
     for (int i = 0; i < padding; ++i) {
       source += ' ';
     }
   }
 
   VkShaderModuleCreateInfo shader_module_create_info = {};
   shader_module_create_info.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
   shader_module_create_info.pCode =
       reinterpret_cast<const uint32_t*>(source.c_str());
-  shader_module_create_info.codeSize = source.length() / 4;
+  shader_module_create_info.codeSize = source.length();
 
   VkShaderModule shader_module = VK_NULL_HANDLE;
   VkResult result =
       vkCreateShaderModule(device_queue_->GetVulkanDevice(),
                            &shader_module_create_info, nullptr, &shader_module);
   if (VK_SUCCESS != result) {
     std::stringstream ss;
     ss << "vkCreateShaderModule() failed: " << result;
     error_messages_ = ss.str();
     DLOG(ERROR) << error_messages_;
     return false;
   }
 
   handle_ = shader_module;
   return true;
 }
 
 void VulkanShaderModule::Destroy() {
   if (handle_ != VK_NULL_HANDLE) {
     vkDestroyShaderModule(device_queue_->GetVulkanDevice(), handle_, nullptr);
     handle_ = VK_NULL_HANDLE;
   }
 
   entry_point_.clear();
   error_messages_.clear();
 }
 
 }  // namespace gpu