Show alert failure for reloading unpacked extensions with bad manifest

chrome/browser/extensions/extension_error_reporter_observer.h

Index: chrome/browser/extensions/extension_error_reporter_observer.h
diff --git a/chrome/browser/extensions/extension_error_reporter_observer.h b/chrome/browser/extensions/extension_error_reporter_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..25a1530f92bbe10d877f9ba7acbfe9bb3dead403
--- /dev/null
+++ b/chrome/browser/extensions/extension_error_reporter_observer.h
@@ -0,0 +1,20 @@
+// Copyright 2014 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_OBSERVER_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_OBSERVER_H_
+
+#include "extensions/common/extension.h"
+
+class Extension;
+
+class ExtensionErrorReporterObserver {

[Devlin, 2014/06/24 22:21:12]

This class is small enough and should have few enough implementors that it can
be nested as an inner class in ExtensionErrorReporter.

+ public:
+  virtual ~ExtensionErrorReporterObserver() {}
+
+  virtual void OnLoadFailure(const base::FilePath& extension_path,
+                             const std::string& error) {}

[Devlin, 2014/06/24 22:21:12]

Since this is the only method, we should make it pure virtual.

+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_OBSERVER_H_