[SyncFS] Add TaskLog tab on chrome://syncfs-internals

chrome/browser/resources/sync_file_system_internals/main.css

Index: chrome/browser/resources/sync_file_system_internals/main.css
diff --git a/chrome/browser/resources/sync_file_system_internals/main.css b/chrome/browser/resources/sync_file_system_internals/main.css
index a5a141cf138f21eda8b9774aca814e729b58dd57..444051050da8027b5cdd0763965fc9d3a7bf5d6e 100644
--- a/chrome/browser/resources/sync_file_system_internals/main.css
+++ b/chrome/browser/resources/sync_file_system_internals/main.css
@@ -40,6 +40,28 @@ tbody tr:nth-child(odd) {
   background: rgb(255, 220, 220);
 }
 
+.task-log-details label {
+  cursor: pointer;
+}
+
+.task-log-collapse-check {
+  vertical-align: top;
+}
+
+.task-log-collapse-check ~ ul {
+  display: inline-block;
+  height: 1em;
+  list-style: none;
+  margin: 0;
+  overflow: hidden;
+  padding: 0;
+  position: relative;
+}
+
+.task-log-collapse-check:checked ~ ul {
+  height: auto;
+}
+
 .file-icon {
   background-image: url('chrome://syncfs-internals/file.png');
   background-position: 0 2px;