Missing is<Browser> methods with recent versions of ClojureScript

[paulbutcher]

I'm getting a number of warnings about missing is<Browser> methods when compiling with recent versions of ClojureScript (it seems to have been introduced by version 1.10.896):

[Figwheel:WARNING] Compile Warning   resources/public/cljs-out/dirac/runtime/util.cljs   line:32  column:22

  Use of undeclared Var goog.labs.userAgent.browser/isOpera

  27  
  28  (defn platform-str [name name-placeholder version version-placeholder]
  29    (str (str-or-placeholder name name-placeholder) "/" (str-or-placeholder version version-placeholder)))
  30  
  31  (defn get-browser-version-info []
  32    (let [browser-name (get-current-browser-name)
                           ^---
  33          browser-version (ua-browser/getVersion)]
  34      (platform-str browser-name "?" browser-version "?")))
  35  
  36  (defn get-browser-platform-info []
  37    (let [platform-name (get-current-platform-name)

[Figwheel:WARNING] Compile Warning   resources/public/cljs-out/dirac/runtime/util.cljs   line:32  column:22

  Use of undeclared Var goog.labs.userAgent.browser/isIE

  27  
  28  (defn platform-str [name name-placeholder version version-placeholder]
  29    (str (str-or-placeholder name name-placeholder) "/" (str-or-placeholder version version-placeholder)))
  30  
  31  (defn get-browser-version-info []
  32    (let [browser-name (get-current-browser-name)
                           ^---
  33          browser-version (ua-browser/getVersion)]
  34      (platform-str browser-name "?" browser-version "?")))
  35  
  36  (defn get-browser-platform-info []
  37    (let [platform-name (get-current-platform-name)

[Figwheel:WARNING] Compile Warning   resources/public/cljs-out/dirac/runtime/util.cljs   line:32  column:22

  Use of undeclared Var goog.labs.userAgent.browser/isEdge

  27  
  28  (defn platform-str [name name-placeholder version version-placeholder]
  29    (str (str-or-placeholder name name-placeholder) "/" (str-or-placeholder version version-placeholder)))
  30  
  31  (defn get-browser-version-info []
  32    (let [browser-name (get-current-browser-name)
                           ^---
  33          browser-version (ua-browser/getVersion)]
  34      (platform-str browser-name "?" browser-version "?")))
  35  
  36  (defn get-browser-platform-info []
  37    (let [platform-name (get-current-platform-name)

[Figwheel:WARNING] Compile Warning: Use of undeclared Var goog.labs.userAgent.browser/isFirefox  resources/public/cljs-out/dirac/runtime/util.cljs   line:32  column:22
[Figwheel:WARNING] Compile Warning: Use of undeclared Var goog.labs.userAgent.browser/isSafari  resources/public/cljs-out/dirac/runtime/util.cljs   line:32  column:22
[Figwheel:WARNING] Compile Warning: Use of undeclared Var goog.labs.userAgent.browser/isCoast  resources/public/cljs-out/dirac/runtime/util.cljs   line:32  column:22
[Figwheel:WARNING] Compile Warning: Use of undeclared Var goog.labs.userAgent.browser/isChrome  resources/public/cljs-out/dirac/runtime/util.cljs   line:32  column:22
[Figwheel:WARNING] Compile Warning: Use of undeclared Var goog.labs.userAgent.browser/isChrome  resources/public/cljs-out/dirac/runtime/repl.cljs   line:23  column:13
[Figwheel:WARNING] Compile Warning: Use of undeclared Var goog.labs.userAgent.browser/isChrome  resources/public/cljs-out/devtools/async.cljs   line:13  column:14
[Figwheel:WARNING] Compile Warning: Use of undeclared Var goog.labs.userAgent.browser/isChrome  resources/public/cljs-out/devtools/formatters.cljs   line:17  column:13

It looks like these methods have been removed from Google Closure Library. As far as I can see get-current-browser-name is only used within the various different transit.json files, and as I'm unfamiliar with what these do within Dirac, I'm not sure what the right fix might be?