Fails InstallableManager if a selected badge icon cannot be fetched.

chrome/browser/installable/installable_logging.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/browser/installable/installable_logging.h"
 
 #include "base/macros.h"
 #include "base/strings/stringprintf.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 32 matching lines @@
     "%spx is required, the sizes attribute must be set, and the purpose "
     "attribute, if set, must include \"any\".";
 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 kNoAcceptableIconMessage[] =
     "a %spx square icon is required, but no supplied icon meets this "
     "requirement";
 static const char kCannotDownloadIconMessage[] =
-    "could not download the specified icon";
+    "could not download a required icon from the manifest";
 static const char kNoIconAvailableMessage[] =
-    "no icon available to display";
+    "icon downloaded from the manifest was empty or corrupted";
 static const char kPlatformNotSupportedOnAndroidMessage[] =
     "the specified application platform is not supported on Android";
 static const char kNoIdSpecifiedMessage[] =
     "no Play store ID provided";
 static const char kIdsDoNotMatchMessage[] =
     "a Play Store app URL and Play Store ID were specified in the manifest, "
     "but they do not match";
 static const char kUrlNotSupportedForWebApkMessage[] =
     "a URL in the web manifest contains a username, password, or port";
 static const char kInIncognitoMessage[] =
@@ skipping 90 matching lines @@
       break;
   }
 
   if (!pattern)
     return;
   std::string message = param.empty() ?
       pattern : base::StringPrintf(pattern, param.c_str());
   web_contents->GetMainFrame()->AddMessageToConsole(
       severity, GetMessagePrefix() + message);
 }