Surface: Fix errors messages printing format instead of present/alphaMode

Fixed: 348590029
Change-Id: Icbf67399a49f49fde5f735584f346a261418158b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/194841
Commit-Queue: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
diff --git a/src/dawn/native/Surface.cpp b/src/dawn/native/Surface.cpp
index 811fec7..c0b322b 100644
--- a/src/dawn/native/Surface.cpp
+++ b/src/dawn/native/Surface.cpp
@@ -218,13 +218,13 @@
                                    capabilities.presentModes.end(), config->presentMode);
     DAWN_INVALID_IF(presentModeIt == capabilities.presentModes.end(),
                     "Present mode (%s) is not supported by the adapter (%s) for this surface.",
-                    config->format, config->device->GetAdapter());
+                    config->presentMode, config->device->GetAdapter());
 
     auto alphaModeIt = std::find(capabilities.alphaModes.begin(), capabilities.alphaModes.end(),
                                  config->alphaMode);
     DAWN_INVALID_IF(alphaModeIt == capabilities.alphaModes.end(),
                     "Alpha mode (%s) is not supported by the adapter (%s) for this surface.",
-                    config->format, config->device->GetAdapter());
+                    config->alphaMode, config->device->GetAdapter());
 
     // Validate the surface would produce valid textures.
     TextureDescriptor textureDesc;