Kaleidoscope: Use Closure compiler on Kaleidoscope JavaScript

This CL adds the Kaleidoscope Closure compilation to the
webui_closure_compile target.

Bug: 1046370
Change-Id: I779bc88edffda6b722fd049bccbbb071a37eb271
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2026368Reviewed-by: Becca Hughes <beccahughes@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Tommy Steimel <steimel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736844}

BUILD.gn

@@ -13,6 +13,7 @@ import("//build/config/features.gni")
 import("//build/config/sanitizers/sanitizers.gni")
 import("//build/config/ui.gni")
 import("//build/util/generate_wrapper.gni")
+import("//chrome/browser/buildflags.gni")
 import("//chrome/browser/media/router/features.gni")
 import("//components/nacl/features.gni")
 import("//device/vr/buildflags/buildflags.gni")
@@ -1330,6 +1331,10 @@ if (closure_compile) {
     if (is_android) {
       data_deps += [ "components/offline_pages/resources:closure_compile" ]
     }
+    if (enable_kaleidoscope) {
+      data_deps +=
+          [ "chrome/browser/media/kaleidoscope/internal:closure_compile" ]
+    }
   }
 }