Add new flag for experimental app banners.

chrome/common/chrome_features.cc

 // Copyright 2016 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/common/chrome_features.h"
 
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
 #include "extensions/features/features.h"
 #include "ppapi/features/features.h"
@@ skipping 134 matching lines @@
 // Grant or Deny decision in a permission prompt.
 const base::Feature kDisplayPersistenceToggleInPermissionPrompts{
     "DisplayPersistenceToggleInPermissionPrompts",
     base::FEATURE_DISABLED_BY_DEFAULT};
 
 // Enables Expect CT reporting, which sends reports for opted-in sites
 // that don't serve sufficient Certificate Transparency information.
 const base::Feature kExpectCTReporting{"ExpectCTReporting",
                                        base::FEATURE_ENABLED_BY_DEFAULT};
 
+// An experimental way of showing app banners, which has modal banners and gives
+// developers more control over when to show them.
+const base::Feature kExperimentalAppBanners{"ExperimentalAppBanners",
+                                            base::FEATURE_DISABLED_BY_DEFAULT};
+
 // An experimental fullscreen prototype that allows pages to map browser and
 // system-reserved keyboard shortcuts.
 const base::Feature kExperimentalKeyboardLockUI{
     "ExperimentalKeyboardLockUI", base::FEATURE_DISABLED_BY_DEFAULT};
 
 #if defined(OS_WIN)
 // Enables using GDI to print text as simply text.
 const base::Feature kGdiTextPrinting {"GdiTextPrinting",
                                       base::FEATURE_DISABLED_BY_DEFAULT};
 #endif
@@ skipping 240 matching lines @@
   return base::FeatureList::IsEnabled(features::kPrefService) ||
 #if BUILDFLAG(ENABLE_PACKAGE_MASH_SERVICES)
          base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
              switches::kMusConfig) == switches::kMash;
 #else
          false;
 #endif
 }
 
 }  // namespace features