Upstream read-only and read-write storage texture access

Bug: dawn:1972
Change-Id: I7bed68c31477b9e2100c23897d323a4de53efbd0
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/168640
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Fr <beaufort.francois@gmail.com>
diff --git a/src/dawn/dawn.json b/src/dawn/dawn.json
index 7654e43..672a9ed 100644
--- a/src/dawn/dawn.json
+++ b/src/dawn/dawn.json
@@ -409,8 +409,8 @@
         "values": [
             {"value": 0, "name": "undefined", "jsrepr": "undefined", "valid": false},
             {"value": 1, "name": "write only"},
-            {"value": 2, "name": "read only", "tags": ["dawn"]},
-            {"value": 3, "name": "read write", "tags": ["dawn"]}
+            {"value": 2, "name": "read only"},
+            {"value": 3, "name": "read write"}
         ]
     },
     "storage texture binding layout": {