Show alert failure for reloading unpacked extensions with bad manifest

chrome/browser/extensions/extension_error_reporter.h

 // Copyright (c) 2011 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_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_
 
 #include <string>
 #include <vector>
 
 #include "base/strings/string16.h"
+#include "base/observer_list.h"
 
 namespace base {
 class MessageLoop;
 class FilePath;
 }
 
 class Profile;
+class ExtensionErrorReporterObserver;
 
 // Exposes an easy way for the various components of the extension system to
 // report errors. This is a singleton that lives on the UI thread, with the
 // exception of ReportError() which may be called from any thread.
 // TODO(aa): Hook this up to about:extensions, when we have about:extensions.
 // TODO(aa): Consider exposing directly, or via a helper, to the renderer
 // process and plumbing the errors out to the browser.
 // TODO(aa): Add ReportError(extension_id, message, be_noisy), so that we can
 // report errors that are specific to a particular extension.
 class ExtensionErrorReporter {
@@ skipping 18 matching lines @@
   // Report an error. Errors always go to VLOG(1). Optionally, they can also
   // cause a noisy alert box.
   void ReportError(const base::string16& message, bool be_noisy);
 
   // Get the errors that have been reported so far.
   const std::vector<base::string16>* GetErrors();
 
   // Clear the list of errors reported so far.
   void ClearErrors();
 
+  void AddObserver(ExtensionErrorReporterObserver* observer);
+  void RemoveObserver(ExtensionErrorReporterObserver* observer);
+  void TriggerOnLoadFailure(const base::FilePath& extension_path,
+                            const std::string& error);
+
  private:
   static ExtensionErrorReporter* instance_;
 
   explicit ExtensionErrorReporter(bool enable_noisy_errors);
   ~ExtensionErrorReporter();
 
   base::MessageLoop* ui_loop_;
   std::vector<base::string16> errors_;
   bool enable_noisy_errors_;
+
+  ObserverList<ExtensionErrorReporterObserver> observers_;
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_