App Banner: require 'display' to be set to 'standalone' or 'fullscreen'.

chrome/browser/banners/app_banner_debug_log.cc

 // Copyright 2015 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/banners/app_banner_debug_log.h"
 
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 
@@ skipping 12 matching lines @@
 static const char kNoMatchingServiceWorkerMessage[] =
     "no matching service worker detected. You may need to reload the page, or "
     "check that the service worker for the current page also controls the "
     "start URL from the manifest";
 static const char kNoIconAvailableMessage[] =
     "no icon available to display";
 static const char kUserNavigatedBeforeBannerShownMessage[] =
     "the user navigated before the banner could be shown";
 static const char kStartURLNotValidMessage[] =
     "start URL in manifest is not valid";
+static const char kManifestDisplayStandaloneFullscreenMessage[] =
+    "manifest display property must be set to 'standalone' or 'fullscreen'";
 static const char kManifestMissingNameOrShortNameMessage[] =
     "one of manifest name or short name must be specified";
 static const char kManifestMissingSuitableIconMessage[] =
     "manifest does not contain a suitable icon - PNG format of at least "
     "144x144px is required, and the sizes attribute must be set";
 static const char kNotLoadedInMainFrameMessage[] =
     "page not loaded in the main frame";
 static const char kNotServedFromSecureOriginMessage[] =
     "page not served from a secure origin";
 // The leading space is intentional as another string is prepended.
@@ skipping 44 matching lines @@
     case kNoIconAvailable:
       pattern = kNoIconAvailableMessage;
       break;
     case kUserNavigatedBeforeBannerShown:
       pattern = kUserNavigatedBeforeBannerShownMessage;
       severity = content::CONSOLE_MESSAGE_LEVEL_WARNING;
       break;
     case kStartURLNotValid:
       pattern = kStartURLNotValidMessage;
       break;
+    case kManifestDisplayStandaloneFullscreen:
+      pattern = kManifestDisplayStandaloneFullscreenMessage;
+      break;
     case kManifestMissingNameOrShortName:
       pattern = kManifestMissingNameOrShortNameMessage;
       break;
     case kManifestMissingSuitableIcon:
       pattern = kManifestMissingSuitableIconMessage;
       break;
     case kNotLoadedInMainFrame:
       pattern = kNotLoadedInMainFrameMessage;
       break;
     case kNotServedFromSecureOrigin:
@@ skipping 14 matching lines @@
       return;
   }
   std::string message = param.empty() ?
       pattern : base::StringPrintf(pattern, param.c_str());
   web_contents->GetMainFrame()->AddMessageToConsole(
       severity, "App banner not shown: " + message);
 
 }
 
 }  // namespace banners