Improve error messaging of webRequest API in case of conflicts

chrome/browser/extensions/extension_warning_badge_service.h

+// Copyright (c) 2012 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_WARNING_BADGE_SERVICE_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_WARNING_BADGE_SERVICE_H_
+
+#include "base/compiler_specific.h"
+#include "base/threading/non_thread_safe.h"
+#include "chrome/browser/extensions/extension_warning_service.h"
+#include "chrome/browser/extensions/extension_warning_set.h"
+
+// TODO(battre): Rename ExtensionWarningBadgeService to WarningBadgeService.
+
+class Profile;
+
+namespace extensions {
+
+// A service that is responsible for showing an extension warning badge on the
+// wrench menu.
+class ExtensionWarningBadgeService : public ExtensionWarningService::Observer,
+                                     public base::NonThreadSafe {
+ public:
+  explicit ExtensionWarningBadgeService(Profile* profile);
+  virtual ~ExtensionWarningBadgeService();
+
+  // Black lists all currently active extension warnings, so that they do not
+  // trigger a warning badge again for the life-time of the browsing session.
+  void SuppressCurrentWarnings();
+
+ protected:
+  // Virtual for testing.
+  virtual const std::set<ExtensionWarning>& GetCurrentWarnings() const;
+
+ private:
+  // Implementation of ExtensionWarningService::Observer.
+  virtual void ExtensionWarningsChanged() OVERRIDE;
+
+  void UpdateBadgeStatus();
+  virtual void ShowBadge(bool show);
+
+  Profile* profile_;
+
+  // Warnings that do not trigger a badge on the wrench menu.
+  ExtensionWarningSet suppressed_warnings_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionWarningBadgeService);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_WARNING_BADGE_SERVICE_H_