Omnibox Metrics - Record Clipboard URL Impressions

components/omnibox/browser/clipboard_url_provider.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/omnibox/browser/clipboard_url_provider.h"
 
 #include "base/logging.h"
+#include "base/metrics/histogram_macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/omnibox/browser/autocomplete_input.h"
 #include "components/omnibox/browser/autocomplete_provider_client.h"
 #include "components/omnibox/browser/verbatim_match.h"
 #include "components/open_from_clipboard/clipboard_recent_content.h"
 #include "components/strings/grit/components_strings.h"
 #include "components/url_formatter/url_formatter.h"
 #include "ui/base/l10n/l10n_util.h"
 
 ClipboardURLProvider::ClipboardURLProvider(
@@ skipping 25 matching lines @@
     return;
 
   DCHECK(url.is_valid());
   // If the omnibox is not empty, add a default match.
   // This match will be opened when the user presses "Enter".
   if (!input.text().empty()) {
     AutocompleteMatch verbatim_match = VerbatimMatchForURL(
         client_, input, input.current_url(), history_url_provider_, -1);
     matches_.push_back(verbatim_match);
   }
+  UMA_HISTOGRAM_BOOLEAN("Omnibox.ClipboardSuggestionShownWithCurrentURL",
+                        !matches_.empty());
 
   // Add the clipboard match. The relevance is 800 to beat ZeroSuggest results.
   AutocompleteMatch match(this, 800, false, AutocompleteMatchType::CLIPBOARD);
   match.destination_url = url;
   match.contents.assign(url_formatter::FormatUrl(
       url, url_formatter::kFormatUrlOmitAll, net::UnescapeRule::SPACES,
       nullptr, nullptr, nullptr));
   AutocompleteMatch::ClassifyLocationInString(
       base::string16::npos, 0, match.contents.length(),
       ACMatchClassification::URL, &match.contents_class);
 
   match.description.assign(l10n_util::GetStringUTF16(IDS_LINK_FROM_CLIPBOARD));
   AutocompleteMatch::ClassifyLocationInString(
       base::string16::npos, 0, match.description.length(),
       ACMatchClassification::NONE, &match.description_class);
 
   matches_.push_back(match);
 }