Specify version for certificateProvider PSS enums

Document the minimum Chrome version for the new enum values in the
chrome.certificateProvider API that were introduced in r828892 (the
new PSS-related entries in the Algorithm enum).

Without this change, the documentation at developer.chrome.com doesn't
contain information that these enums were added later than the other
ones. Apparently, the documentation only autogenerates these notices for
types and methods, but not for enum items.

Bug: 792204
Change-Id: Ia81a11691d9db5e1ba75cacd0d6dda53e679d0d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2550545
Auto-Submit: Maksim Ivanov <emaxx@chromium.org>
Commit-Queue: Karan Bhatia <karandeepb@chromium.org>
Reviewed-by: Karan Bhatia <karandeepb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#829640}

chrome/common/extensions/api/certificate_provider.idl

@@ -20,14 +20,17 @@ namespace certificateProvider {
     RSASSA_PKCS1_v1_5_SHA384,
     // RSASSA PKCS#1 v1.5 signature algorithm with the SHA-512 hashing function.
     RSASSA_PKCS1_v1_5_SHA512,
-    // RSASSA PSS signature algorithm with the SHA-256 hashing function, MGF1
-    // mask generation function and the salt of the same size as the hash.
+    // Since Chrome 89. RSASSA PSS signature algorithm with the SHA-256 hashing
+    // function, MGF1 mask generation function and the salt of the same size as
+    // the hash.
     RSASSA_PSS_SHA256,
-    // RSASSA PSS signature algorithm with the SHA-384 hashing function, MGF1
-    // mask generation function and the salt of the same size as the hash.
+    // Since Chrome 89. RSASSA PSS signature algorithm with the SHA-384 hashing
+    // function, MGF1 mask generation function and the salt of the same size as
+    // the hash.
     RSASSA_PSS_SHA384,
-    // RSASSA PSS signature algorithm with the SHA-512 hashing function, MGF1
-    // mask generation function and the salt of the same size as the hash.
+    // Since Chrome 89. RSASSA PSS signature algorithm with the SHA-512 hashing
+    // function, MGF1 mask generation function and the salt of the same size as
+    // the hash.
     RSASSA_PSS_SHA512
   };