Warn user in case extension delays network traffic too much.

chrome/browser/extensions/extension_global_error.h

Index: chrome/browser/extensions/extension_global_error.h
diff --git a/chrome/browser/extensions/extension_global_error.h b/chrome/browser/extensions/extension_global_error.h
new file mode 100644
index 0000000000000000000000000000000000000000..fdcb0b448b0e6d4b9295741fad435d153f11c6ae
--- /dev/null
+++ b/chrome/browser/extensions/extension_global_error.h
@@ -0,0 +1,42 @@
+// 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_GLOBAL_ERROR_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_GLOBAL_ERROR_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "chrome/browser/ui/global_error.h"
+
+// GlobalError implementation that warns the user if extensions created
+// warnings or errors. If the user clicks on the wrench menu, the user
+// is redirected to chrome://extensions to inspect the errors.
+class ExtensionGlobalError : public GlobalError {
+ public:
+  ExtensionGlobalError();
+  virtual ~ExtensionGlobalError();
+
+  // Implementation for GlobalError:
+  virtual bool HasBadge() OVERRIDE;
+
+  virtual bool HasMenuItem() OVERRIDE;
+  virtual int MenuItemCommandID() OVERRIDE;
+  virtual string16 MenuItemLabel() OVERRIDE;
+  virtual void ExecuteMenuItem(Browser* browser) OVERRIDE;
+
+  virtual bool HasBubbleView() OVERRIDE;
+  virtual string16 GetBubbleViewTitle() OVERRIDE;
+  virtual string16 GetBubbleViewMessage() OVERRIDE;
+  virtual string16 GetBubbleViewAcceptButtonLabel() OVERRIDE;
+  virtual string16 GetBubbleViewCancelButtonLabel() OVERRIDE;
+  virtual void BubbleViewDidClose() OVERRIDE;
+  virtual void BubbleViewAcceptButtonPressed() OVERRIDE;
+  virtual void BubbleViewCancelButtonPressed() OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(ExtensionGlobalError);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_GLOBAL_ERROR_H_