Extract AppBannerDataFetcher into an InstallableManager.

chrome/browser/installable/installable_logging.h

+// 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.
+
+#ifndef CHROME_BROWSER_INSTALLABLE_INSTALLABLE_LOGGING_H_
+#define CHROME_BROWSER_INSTALLABLE_INSTALLABLE_LOGGING_H_
+
+#include <string>
+
+namespace content {
+class WebContents;
+}
+
+namespace installable {
+
+// These values are a central reference for installability errors. The
+// InstallableChecker will specify an ErrorCode (or NO_ERROR) in its result.
+// Clients of the InstallableChecker may also add their own error codes to this
+// list, and utilise the LogErrorToConsole method to write a message to the
+// devtools console informing users of any issues.
+// TODO(dominickn) add an UMA metric for this enum.
+enum ErrorCode {
+  NO_ERROR,
+  RENDERER_EXITING,
+  RENDERER_CANCELLED,
+  USER_NAVIGATED,
+  NOT_IN_MAIN_FRAME,
+  NOT_FROM_SECURE_ORIGIN,
+  NO_MANIFEST,
+  MANIFEST_EMPTY,
+  START_URL_NOT_VALID,
+  MANIFEST_MISSING_NAME_OR_SHORT_NAME,
+  MANIFEST_DISPLAY_NOT_SUPPORTED,
+  MANIFEST_MISSING_SUITABLE_ICON,
+  NO_MATCHING_SERVICE_WORKER,
+  NO_ACCEPTABLE_ICON,
+  CANNOT_DOWNLOAD_ICON,
+  NO_ICON_AVAILABLE,
+  PLATFORM_NOT_SUPPORTED_ON_ANDROID,
+  NO_ID_SPECIFIED,
+  IDS_DO_NOT_MATCH,
+  MAX_ERROR_CODE,
+};
+
+// Logs a message associated with |code| with a parameter |param| to the
+// devtools console attached to |web_contents|. Does nothing if |web_contents|
+// is nullptr.
+void LogErrorToConsole(content::WebContents* web_contents,
+                       ErrorCode code,
+                       const std::string& param);
+
+}  // namespace installable
+
+#endif  // CHROME_BROWSER_INSTALLABLE_INSTALLABLE_LOGGING_H_