Add UMA stats for which icon types are shown and clicked on the NTP.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 072c07d013e280bc366113ccf30928bce49b5045..3e5e1b171993d6bea0bfaecfde04eb8956bc20b8 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -3978,6 +3978,15 @@
           'includes': [ '../build/android/java_cpp_enum.gypi' ],
         },
         {
+          # GN: //chrome/android:chrome_android_java_enums_srcjar
+          'target_name': 'most_visited_tile_type_java',
+          'type': 'none',
+          'variables': {
+            'source_file': 'browser/android/most_visited_sites.cc',
+          },
+          'includes': [ '../build/android/java_cpp_enum.gypi' ],
+        },
+        {
           # GN: //chrome/android:resource_id_javagen
           'target_name': 'resource_id_java',
           'type': 'none',