Gather data on Physical Web cached URL scenario

chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java

Index: chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java
index 374f7e042755661bcc37e59dd88b662988db3729..10eea7ebd6f32b0dedf9a0feba46feb958ba2c7e 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/physicalweb/UrlManager.java
@@ -587,8 +587,10 @@ class UrlManager {
             if ((System.currentTimeMillis() - urlInfo.getScanTimestamp() <= MAX_CACHE_TIME
                     && mUrlsSortedByTimestamp.size() <= MAX_CACHE_SIZE)
                     || mNearbyUrls.contains(url)) {
+                Log.d(TAG, "Not garbage collecting: ", urlInfo);
                 break;
             }
+            Log.d(TAG, "Garbage collecting: ", urlInfo);
             // The min value cannot have changed at this point, so it's OK to just remove via
             // poll().
             mUrlsSortedByTimestamp.poll();