Add an extension bubble explaining which extensions are in dev mode.

chrome/browser/extensions/dev_mode_bubble_controller.h

Index: chrome/browser/extensions/dev_mode_bubble_controller.h
diff --git a/chrome/browser/extensions/dev_mode_bubble_controller.h b/chrome/browser/extensions/dev_mode_bubble_controller.h
new file mode 100644
index 0000000000000000000000000000000000000000..4e975e0e08d9054a88459af1a5b1760717314295
--- /dev/null
+++ b/chrome/browser/extensions/dev_mode_bubble_controller.h
@@ -0,0 +1,86 @@
+// Copyright (c) 2013 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_DEV_MODE_BUBBLE_CONTROLLER_H_
+#define CHROME_BROWSER_EXTENSIONS_DEV_MODE_BUBBLE_CONTROLLER_H_
+
+#include <string>
+#include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
+#include "chrome/browser/extensions/extension_message_bubble_controller.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "extensions/common/extension.h"
+
+class Browser;
+class ExtensionService;
+
+namespace extensions {
+
+class DevModeBubble;
+
+class DevModeBubbleController
+    : public ProfileKeyedAPI,
+      public ExtensionMessageBubbleController,
+      public ExtensionMessageBubbleController::Delegate {
+ public:
+  explicit DevModeBubbleController(Profile* profile);
+  virtual ~DevModeBubbleController();
+
+  // ProfileKeyedAPI implementation.
+  static ProfileKeyedAPIFactory<
+      DevModeBubbleController>* GetFactoryInstance();
+
+  // Convenience method to get the DevModeBubbleController for a
+  // profile.
+  static DevModeBubbleController* Get(Profile* profile);
+
+  // Returns true if the extension is considered a Developer Mode extension.
+  bool IsDevModeExtension(const Extension* extension) const;
+
+  // ExtensionMessageBubbleController::Delegate methods.
+  virtual bool ShouldIncludeExtension(const std::string& extension_id) OVERRIDE;
+  virtual void AcknowledgeExtension(
+      const std::string& extension_id,
+      ExtensionMessageBubbleController::BubbleAction user_action) OVERRIDE;
+  virtual void PerformAction(const ExtensionIdList& list) OVERRIDE;
+  virtual string16 GetTitle() const OVERRIDE;
+  virtual string16 GetMessageBody() const OVERRIDE;
+  virtual string16 GetOverflowText(
+      const string16& overflow_count) const OVERRIDE;
+  virtual string16 GetLearnMoreLabel() const OVERRIDE;
+  virtual GURL GetLearnMoreUrl() const OVERRIDE;
+  virtual string16 GetActionButtonLabel() const OVERRIDE;
+  virtual string16 GetDismissButtonLabel() const OVERRIDE;
+  virtual bool ShouldShowExtensionList() const OVERRIDE;
+  virtual std::vector<string16> GetExtensions() OVERRIDE;
+  virtual void LogExtensionCount(size_t count) OVERRIDE;
+  virtual void LogAction(
+      ExtensionMessageBubbleController::BubbleAction action) OVERRIDE;
+
+ private:
+  friend class ProfileKeyedAPIFactory<DevModeBubbleController>;
+
+  // ProfileKeyedAPI implementation.
+  static const char* service_name() {
+    return "DevModeBubbleController";
+  }
+  static const bool kServiceRedirectedInIncognito = true;
+
+  // Our extension service. Weak, not owned by us.
+  ExtensionService* service_;
+
+  // A weak pointer to the profile we are associated with. Not owned by us.
+  Profile* profile_;
+
+
+  DISALLOW_COPY_AND_ASSIGN(DevModeBubbleController);
+};
+
+template <>
+void ProfileKeyedAPIFactory<
+    DevModeBubbleController>::DeclareFactoryDependencies();
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_DEV_MODE_BUBBLE_CONTROLLER_H_