dawn.json: Add a couple missing tags

This avoids exposing Dawn-specific methods to webgpu.h (even if some are
likely to get upstreamed).

Bug: None
Change-Id: I608c6e0d1d6cebcd25d517bba4081525fde20718
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/135960
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
diff --git a/dawn.json b/dawn.json
index ef6259f..87f94e7 100644
--- a/dawn.json
+++ b/dawn.json
@@ -1099,6 +1099,7 @@
             {
                 "name": "create error shader module",
                 "returns": "shader module",
+                "tags": ["dawn"],
                 "args": [
                     {"name": "descriptor", "type": "shader module descriptor", "annotation": "const*"},
                     {"name": "error message", "type": "char", "annotation": "const*", "length": "strlen"}
@@ -2574,7 +2575,7 @@
         "category": "object",
         "methods": [
             {"name": "get current texture view", "returns": "texture view"},
-            {"name": "get current texture", "returns": "texture"},
+            {"name": "get current texture", "returns": "texture", "tags": ["dawn"]},
             {"name": "present"}
         ]
     },