AudioConverter: Express delay in frames rather than msec.

chrome/browser/copresence/chrome_whispernet_client_browsertest.cc

Index: chrome/browser/copresence/chrome_whispernet_client_browsertest.cc
diff --git a/chrome/browser/copresence/chrome_whispernet_client_browsertest.cc b/chrome/browser/copresence/chrome_whispernet_client_browsertest.cc
index 4a834f3477c72c62c8f0f1ac5d9ce7a1b59db38f..c9cdc5d77996148eea96497f411273d9b3290130 100644
--- a/chrome/browser/copresence/chrome_whispernet_client_browsertest.cc
+++ b/chrome/browser/copresence/chrome_whispernet_client_browsertest.cc
@@ -207,7 +207,7 @@ class ChromeWhispernetClientTest : public ExtensionBrowserTest,
 
   // AudioConverter::InputCallback overrides:
   double ProvideInput(media::AudioBus* dest,
-                      base::TimeDelta /* buffer_delay */) override {
+                      uint32_t /* frames_delayed */) override {
     // Copy any saved samples we have to the output bus.
     const int remaining_frames =
         saved_samples_->frames() - saved_samples_index_;