[STTS] Show notification for all pending entries.

The code was only sending the first SendTabToSelf to UI handlers.
This CL changes this to send all the entries to the handlers.

Bug: 943678
Change-Id: Ia938d57779dfeb8878568da17b659149cef048a4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1531379
Auto-Submit: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Reviewed-by: Jeffrey Cohen <jeffreycohen@chromium.org>
Commit-Queue: Sebastien Seguin-Gagnon <sebsg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#642684}

chrome/browser/send_tab_to_self/send_tab_to_self_client_service.cc

@@ -36,11 +36,11 @@ void SendTabToSelfClientService::SendTabToSelfModelLoaded() {
 
 void SendTabToSelfClientService::EntriesAddedRemotely(
     const std::vector<const SendTabToSelfEntry*>& new_entries) {
-  // TODO(tgupta):Figure out whether it is better to pass in one entry at
-  // a time or to pass all the entries at once.
-  for (std::unique_ptr<ReceivingUiHandler>& handler :
-       registry_->GetHandlers()) {
-    handler->DisplayNewEntry(new_entries[0]);
+  for (const SendTabToSelfEntry* entry : new_entries) {
+    for (std::unique_ptr<ReceivingUiHandler>& handler :
+         registry_->GetHandlers()) {
+      handler->DisplayNewEntry(entry);
+    }
   }
 }