layers: Add getSwapchainFromImage() helper

Add getSwapchainFromImage() to core_validation and use it from
DescriptorSet class.
diff --git a/layers/descriptor_sets.cpp b/layers/descriptor_sets.cpp
index 795f5d7..2393d30 100644
--- a/layers/descriptor_sets.cpp
+++ b/layers/descriptor_sets.cpp
@@ -265,10 +265,8 @@
 
 cvdescriptorset::DescriptorSet::DescriptorSet(const VkDescriptorSet set, const DescriptorSetLayout *layout,
                                               const core_validation::layer_data *dev_data,
-                                              const std::unordered_map<VkImage, VkSwapchainKHR> *image_to_swapchain_map,
                                               const std::unordered_map<VkSwapchainKHR, SWAPCHAIN_NODE *> *swapchain_map)
-    : some_update_(false), set_(set), p_layout_(layout), device_data_(dev_data), image_to_swapchain_map_(image_to_swapchain_map),
-      swapchain_map_(swapchain_map) {
+    : some_update_(false), set_(set), p_layout_(layout), device_data_(dev_data), swapchain_map_(swapchain_map) {
     // Foreach binding, create default descriptors of given type
     for (uint32_t i = 0; i < p_layout_->GetBindingCount(); ++i) {
         auto type = p_layout_->GetTypeFromIndex(i);
@@ -583,7 +581,6 @@
 
 bool cvdescriptorset::ValidateImageUpdate(VkImageView image_view, VkImageLayout image_layout, VkDescriptorType type,
                                           const core_validation::layer_data *dev_data,
-                                          const std::unordered_map<VkImage, VkSwapchainKHR> *image_to_swapchain_map,
                                           const std::unordered_map<VkSwapchainKHR, SWAPCHAIN_NODE *> *swapchain_map,
                                           std::string *error) {
     auto iv_data = getImageViewData(dev_data, image_view);
@@ -605,9 +602,8 @@
         usage = image_node->createInfo.usage;
     } else {
         // Also need to check the swapchains.
-        auto swapchain_pair = image_to_swapchain_map->find(image);
-        if (swapchain_pair != image_to_swapchain_map->end()) {
-            VkSwapchainKHR swapchain = swapchain_pair->second;
+        auto swapchain = getSwapchainFromImage(dev_data, image);
+        if (swapchain) {
             auto swapchain_pair = swapchain_map->find(swapchain);
             if (swapchain_pair != swapchain_map->end()) {
                 format = swapchain_pair->second->createInfo.imageFormat;
@@ -1032,8 +1028,7 @@
             // Validate image
             auto image_view = update->pImageInfo[di].imageView;
             auto image_layout = update->pImageInfo[di].imageLayout;
-            if (!ValidateImageUpdate(image_view, image_layout, update->descriptorType, device_data_, image_to_swapchain_map_,
-                                     swapchain_map_, error)) {
+            if (!ValidateImageUpdate(image_view, image_layout, update->descriptorType, device_data_, swapchain_map_, error)) {
                 std::stringstream error_str;
                 error_str << "Attempted write update to combined image sampler descriptor failed due to: " << error->c_str();
                 *error = error_str.str();
@@ -1064,8 +1059,7 @@
         for (uint32_t di = 0; di < update->descriptorCount; ++di) {
             auto image_view = update->pImageInfo[di].imageView;
             auto image_layout = update->pImageInfo[di].imageLayout;
-            if (!ValidateImageUpdate(image_view, image_layout, update->descriptorType, device_data_, image_to_swapchain_map_,
-                                     swapchain_map_, error)) {
+            if (!ValidateImageUpdate(image_view, image_layout, update->descriptorType, device_data_, swapchain_map_, error)) {
                 std::stringstream error_str;
                 error_str << "Attempted write update to image descriptor failed due to: " << error->c_str();
                 *error = error_str.str();
@@ -1155,8 +1149,7 @@
             // Validate image
             auto image_view = img_samp_desc->GetImageView();
             auto image_layout = img_samp_desc->GetImageLayout();
-            if (!ValidateImageUpdate(image_view, image_layout, type, device_data_, image_to_swapchain_map_, swapchain_map_,
-                                     error)) {
+            if (!ValidateImageUpdate(image_view, image_layout, type, device_data_, swapchain_map_, error)) {
                 std::stringstream error_str;
                 error_str << "Attempted copy update to combined image sampler descriptor failed due to: " << error->c_str();
                 *error = error_str.str();
@@ -1169,8 +1162,7 @@
             auto img_desc = static_cast<const ImageDescriptor *>(src_set->descriptors_[index + di].get());
             auto image_view = img_desc->GetImageView();
             auto image_layout = img_desc->GetImageLayout();
-            if (!ValidateImageUpdate(image_view, image_layout, type, device_data_, image_to_swapchain_map_, swapchain_map_,
-                                     error)) {
+            if (!ValidateImageUpdate(image_view, image_layout, type, device_data_, swapchain_map_, error)) {
                 std::stringstream error_str;
                 error_str << "Attempted copy update to image descriptor failed due to: " << error->c_str();
                 *error = error_str.str();
@@ -1280,7 +1272,6 @@
     const VkDescriptorSetAllocateInfo *p_alloc_info, const VkDescriptorSet *descriptor_sets,
     const AllocateDescriptorSetsData *ds_data, std::unordered_map<VkDescriptorPool, DESCRIPTOR_POOL_NODE *> *pool_map,
     std::unordered_map<VkDescriptorSet, cvdescriptorset::DescriptorSet *> *set_map, const core_validation::layer_data *dev_data,
-    const std::unordered_map<VkImage, VkSwapchainKHR> &image_to_swapchain_map,
     const std::unordered_map<VkSwapchainKHR, SWAPCHAIN_NODE *> &swapchain_map) {
     auto pool_state = (*pool_map)[p_alloc_info->descriptorPool];
     /* Account for sets and individual descriptors allocated from pool */
@@ -1292,8 +1283,7 @@
      * global map and the pool's set.
      */
     for (uint32_t i = 0; i < p_alloc_info->descriptorSetCount; i++) {
-        auto new_ds = new cvdescriptorset::DescriptorSet(descriptor_sets[i], ds_data->layout_nodes[i], dev_data,
-                                                         &image_to_swapchain_map, &swapchain_map);
+        auto new_ds = new cvdescriptorset::DescriptorSet(descriptor_sets[i], ds_data->layout_nodes[i], dev_data, &swapchain_map);
 
         pool_state->sets.insert(new_ds);
         new_ds->in_use.store(0);