Fix an std::remove_if usage in ContextualSuggestionsDebuggingReporter

container. Just move items to the end of the range.

std: :remove_if does not actually remove the selected element from the
Change-Id: I3868f83b027e85b36f9097e1325c69cb1a067875
Reviewed-on: https://chromium-review.googlesource.com/1078028Reviewed-by: Patrick Noland <pnoland@chromium.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563143}

components/ntp_snippets/contextual/contextual_suggestions_debugging_reporter.cc

@@ -70,10 +70,12 @@ void ContextualSuggestionsDebuggingReporter::Flush() {
   // Check if we've already sent an event with this url to the cache. If so,
   // remove it before adding another one.
   const std::string current_url = current_event_.url;
+  auto itr =
       std::remove_if(events_.begin(), events_.end(),
                      [current_url](ContextualSuggestionsDebuggingEvent event) {
                        return current_url == event.url;
                      });
+  events_.erase(itr, events_.end());
   events_.push_back(current_event_);
 
   // If the cache is too large, then remove the least recently used.