[App banners] Add server-controlled experiment to disable app banners

chrome/browser/android/banners/app_banner_manager.cc

Index: chrome/browser/android/banners/app_banner_manager.cc
diff --git a/chrome/browser/android/banners/app_banner_manager.cc b/chrome/browser/android/banners/app_banner_manager.cc
index b3f1f565a84e9d924593074472abcee91177f957..35e0b253d27f5d65a72a5317baa2db548a011f53 100644
--- a/chrome/browser/android/banners/app_banner_manager.cc
+++ b/chrome/browser/android/banners/app_banner_manager.cc
@@ -7,7 +7,7 @@
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/bind.h"
-#include "base/command_line.h"
+#include "base/metrics/field_trial.h"
 #include "base/metrics/histogram.h"
 #include "chrome/browser/android/banners/app_banner_infobar_delegate.h"
 #include "chrome/browser/android/manifest_icon_selector.h"
@@ -19,7 +19,6 @@
 #include "chrome/browser/infobars/infobar_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/chrome_constants.h"
-#include "chrome/common/chrome_switches.h"
 #include "chrome/common/render_messages.h"
 #include "content/public/browser/android/content_view_core.h"
 #include "content/public/browser/browser_context.h"
@@ -355,8 +354,9 @@ jlong Init(JNIEnv* env, jobject obj, jint icon_size) {
 }
 
 jboolean IsEnabled(JNIEnv* env, jclass clazz) {
-  return base::CommandLine::ForCurrentProcess()->HasSwitch(
-      switches::kEnableAppInstallAlerts);
+  const std::string group_name =
+      base::FieldTrialList::FindFullName("AppBanners");
+  return group_name == "Enabled";
 }
 
 void SetTimeDeltaForTesting(JNIEnv* env, jclass clazz, jint days) {