[canvaskit] perform audio asset lookup by layer id

Change-Id: Iac56d11a76be8d90df1159631a02f1713ece1bd8
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/368938
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Jorge Betancourt <jmbetancourt@google.com>
diff --git a/modules/canvaskit/skottie.js b/modules/canvaskit/skottie.js
index f815fc7..acd70ba 100644
--- a/modules/canvaskit/skottie.js
+++ b/modules/canvaskit/skottie.js
@@ -8,6 +8,8 @@
 // prop_filter_prefix is an optional string acting as a name filter for selecting
 // "interesting" Lottie properties (surfaced in the embedded player controls)
 
+// soundMap is an optional object that maps string names to AudioPlayers
+// AudioPlayers manage a single audio layer with a seek function
 CanvasKit.MakeManagedAnimation = function(json, assets, prop_filter_prefix, soundMap) {
   if (!CanvasKit._MakeManagedAnimation) {
     throw 'Not compiled with MakeManagedAnimation';
diff --git a/modules/canvaskit/skottie_bindings.cpp b/modules/canvaskit/skottie_bindings.cpp
index 334bc3a..980d6ab 100644
--- a/modules/canvaskit/skottie_bindings.cpp
+++ b/modules/canvaskit/skottie_bindings.cpp
@@ -70,9 +70,9 @@
     }
 
     sk_sp<skresources::ExternalTrackAsset> loadAudioAsset(const char[] /* path */,
-                                                          const char name[],
-                                                          const char[] /*id*/) override {
-        emscripten::val player = this->findSoundAsset(name);
+                                                          const char[] /* name */,
+                                                          const char id[]) override {
+        emscripten::val player = this->findSoundAsset(id);
         if (player.as<bool>()) {
             return sk_make_sp<WebTrack>(std::move(player));
         }
diff --git a/modules/canvaskit/tests/skottie.spec.js b/modules/canvaskit/tests/skottie.spec.js
index adacd4e..247198a 100644
--- a/modules/canvaskit/tests/skottie.spec.js
+++ b/modules/canvaskit/tests/skottie.spec.js
@@ -97,7 +97,7 @@
             }
         }
         for (let i = 0; i < 20; i++) {
-            var name = 'aud_' + i + '.mp3';
+            var name = 'audio_' + i;
             mockSoundMap.setPlayer(name, new mockPlayer(name));
         }
         fetch('/assets/audio_external.json')