[App banners] Add UMA metrics

chrome/android/BUILD.gn

Index: chrome/android/BUILD.gn
diff --git a/chrome/android/BUILD.gn b/chrome/android/BUILD.gn
index da3a85e3369327f966c7684af240472a925ee8e6..d0908fe4a4cd57298dcaa23e79eb3190a14c3f06 100644
--- a/chrome/android/BUILD.gn
+++ b/chrome/android/BUILD.gn
@@ -104,7 +104,6 @@ android_library("chrome_java") {
   ]
 
   srcjar_deps = [
-    ":app_banner_metrics_ids_javagen",
     ":chrome_android_java_enums_srcjar",
     ":chrome_version_srcjar",
     ":resource_id_javagen",
@@ -139,17 +138,6 @@ java_cpp_enum("chrome_android_java_enums_srcjar") {
   ]
 }
 
-# GYP: //chrome/chrome_browser.gypi:app_banner_metrics_ids_java
-java_cpp_template("app_banner_metrics_ids_javagen") {
-  sources = [
-    "java/AppBannerMetricsIds.template",
-  ]
-  package_name = "org/chromium/chrome/browser/banners"
-  inputs = [
-    "../browser/android/banners/app_banner_metrics_id_list.h",
-  ]
-}
-
 # GYP: //chrome/chrome_browser.gypi:document_tab_model_info_proto_java
 proto_java_library("document_tab_model_info_proto_java") {
   proto_path = "java/src/org/chromium/chrome/browser/tabmodel/document"