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

chrome/browser/android/banners/app_banner_manager.cc

 // Copyright 2014 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 "chrome/browser/android/banners/app_banner_manager.h"
 
 #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"
 #include "chrome/browser/android/shortcut_helper.h"
 #include "chrome/browser/android/shortcut_info.h"
 #include "chrome/browser/banners/app_banner_metrics.h"
 #include "chrome/browser/banners/app_banner_settings_helper.h"
 #include "chrome/browser/bitmap_fetcher/bitmap_fetcher.h"
 #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"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_details.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/service_worker_context.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/frame_navigate_params.h"
@@ skipping 315 matching lines @@
 base::Time AppBannerManager::GetCurrentTime() {
   return base::Time::Now() + gTimeDeltaForTesting;
 }
 
 jlong Init(JNIEnv* env, jobject obj, jint icon_size) {
   AppBannerManager* manager = new AppBannerManager(env, obj, icon_size);
   return reinterpret_cast<intptr_t>(manager);
 }
 
 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) {
   gTimeDeltaForTesting = base::TimeDelta::FromDays(days);
 }
 
 // Register native methods
 bool RegisterAppBannerManager(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace banners