Deprecate clearColor, clearDepth, and clearStencil in dawn.json

Need to mark them as deprecated to remove from webgpu headers.

Bug: dawn:1269
Change-Id: I332e7e4f6a27efd05f4e97240044efb65644cc77
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/82940
Reviewed-by: Austin Eng <enga@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>
Commit-Queue: Shrek Shao <shrekshao@google.com>
diff --git a/dawn.json b/dawn.json
index 0ee7e22..1cead4a 100644
--- a/dawn.json
+++ b/dawn.json
@@ -1806,8 +1806,8 @@
             {"name": "resolve target", "type": "texture view", "optional": true},
             {"name": "load op", "type": "load op"},
             {"name": "store op", "type": "store op"},
-            {"name": "clear color", "type": "color", "default": "{ NAN, NAN, NAN, NAN }" },
-            {"name": "clear value", "type": "color" }
+            {"name": "clear color", "type": "color", "default": "{ NAN, NAN, NAN, NAN }", "tags": ["deprecated"]},
+            {"name": "clear value", "type": "color"}
         ]
     },
 
@@ -1817,12 +1817,12 @@
             {"name": "view", "type": "texture view"},
             {"name": "depth load op", "type": "load op", "default": "undefined"},
             {"name": "depth store op", "type": "store op", "default": "undefined"},
-            {"name": "clear depth", "type": "float", "default": "NAN"},
+            {"name": "clear depth", "type": "float", "default": "NAN", "tags": ["deprecated"]},
             {"name": "depth clear value", "type": "float", "default": "0"},
             {"name": "depth read only", "type": "bool", "default": "false"},
             {"name": "stencil load op", "type": "load op", "default": "undefined"},
             {"name": "stencil store op", "type": "store op", "default": "undefined"},
-            {"name": "clear stencil", "type": "uint32_t", "default": "0"},
+            {"name": "clear stencil", "type": "uint32_t", "default": "0", "tags": ["deprecated"]},
             {"name": "stencil clear value", "type": "uint32_t", "default": "0"},
             {"name": "stencil read only", "type": "bool", "default": "false"}
         ]