Add an extension override bubble and warning box for proxy extensions.

chrome/browser/extensions/proxy_overridden_bubble_controller.h

Index: chrome/browser/extensions/proxy_overridden_bubble_controller.h
diff --git a/chrome/browser/extensions/proxy_overridden_bubble_controller.h b/chrome/browser/extensions/proxy_overridden_bubble_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..be2e0fc354614825e509969ece006dfa45271b03
--- /dev/null
+++ b/chrome/browser/extensions/proxy_overridden_bubble_controller.h
@@ -0,0 +1,39 @@
+// 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_PROXY_OVERRIDDEN_BUBBLE_CONTROLLER_H_
+#define CHROME_BROWSER_EXTENSIONS_PROXY_OVERRIDDEN_BUBBLE_CONTROLLER_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "chrome/browser/extensions/extension_message_bubble_controller.h"
+
+class Profile;
+
+namespace extensions {
+
+class ProxyOverriddenBubbleController
+    : public ExtensionMessageBubbleController {
+ public:
+  explicit ProxyOverriddenBubbleController(Profile* profile);
+  virtual ~ProxyOverriddenBubbleController();
+
+  // Whether the controller knows that we should show the bubble for extension
+  // with |extension_id|. Returns true if so.
+  bool ShouldShow(const std::string& extension_id);
+
+  // ExtensionMessageBubbleController:
+  virtual bool CloseOnDeactivate() OVERRIDE;
+
+ private:
+  // A weak pointer to the profile we are associated with. Not owned by us.
+  Profile* profile_;
+
+  DISALLOW_COPY_AND_ASSIGN(ProxyOverriddenBubbleController);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_PROXY_OVERRIDDEN_BUBBLE_CONTROLLER_H_