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      1 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_
      6 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_
      7 #pragma once
      8 
      9 #include <string>
     10 #include <vector>
     11 
     12 class MessageLoop;
     13 
     14 // Exposes an easy way for the various components of the extension system to
     15 // report errors. This is a singleton that lives on the UI thread, with the
     16 // exception of ReportError() which may be called from any thread.
     17 // TODO(aa): Hook this up to about:extensions, when we have about:extensions.
     18 // TODO(aa): Consider exposing directly, or via a helper, to the renderer
     19 // process and plumbing the errors out to the browser.
     20 // TODO(aa): Add ReportError(extension_id, message, be_noisy), so that we can
     21 // report errors that are specific to a particular extension.
     22 class ExtensionErrorReporter {
     23  public:
     24   // Initializes the error reporter. Must be called before any other methods
     25   // and on the UI thread.
     26   static void Init(bool enable_noisy_errors);
     27 
     28   // Get the singleton instance.
     29   static ExtensionErrorReporter* GetInstance();
     30 
     31   // Report an error. Errors always go to VLOG(1). Optionally, they can also
     32   // cause a noisy alert box. This method can be called from any thread.
     33   void ReportError(const std::string& message, bool be_noisy);
     34 
     35   // Get the errors that have been reported so far.
     36   const std::vector<std::string>* GetErrors();
     37 
     38   // Clear the list of errors reported so far.
     39   void ClearErrors();
     40 
     41  private:
     42   static ExtensionErrorReporter* instance_;
     43 
     44   explicit ExtensionErrorReporter(bool enable_noisy_errors);
     45   ~ExtensionErrorReporter();
     46 
     47   MessageLoop* ui_loop_;
     48   std::vector<std::string> errors_;
     49   bool enable_noisy_errors_;
     50 };
     51 
     52 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_ERROR_REPORTER_H_
     53