[Mac] Convert content settings to LocationBarDecoration, cleanup.

chrome/browser/cocoa/location_bar/content_setting_decoration.h

+// Copyright (c) 2010 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_COCOA_LOCATION_BAR_CONTENT_SETTING_DECORATION_H_
+#define CHROME_BROWSER_COCOA_LOCATION_BAR_CONTENT_SETTING_DECORATION_H_
+
+#include "base/scoped_ptr.h"
+#import "chrome/browser/cocoa/location_bar/image_decoration.h"
+#include "chrome/common/content_settings_types.h"
+
+// ContentSettingDecoration is used to display the content settings
+// images on the current page.
+
+class ContentSettingImageModel;
+class LocationBarViewMac;
+class Profile;
+class TabContents;
+
+class ContentSettingDecoration : public ImageDecoration {
+ public:
+  ContentSettingDecoration(ContentSettingsType settings_type,
+                           LocationBarViewMac* owner,
+                           Profile* profile);
+  virtual ~ContentSettingDecoration();
+
+  // Updates the image and visibility state based on the supplied TabContents.
+  void UpdateFromTabContents(const TabContents* tab_contents);
+
+  // Overridden from |LocationBarDecoration|
+  virtual bool OnMousePressed(NSRect frame);
+  virtual NSString* GetToolTip();
+
+ private:
+  void SetToolTip(NSString* tooltip);
+
+  scoped_ptr<ContentSettingImageModel> content_setting_image_model_;
+
+  LocationBarViewMac* owner_;  // weak
+  Profile* profile_;  // weak
+
+  scoped_nsobject<NSString> tooltip_;
+
+  DISALLOW_COPY_AND_ASSIGN(ContentSettingDecoration);
+};
+
+#endif  // CHROME_BROWSER_COCOA_LOCATION_BAR_CONTENT_SETTING_DECORATION_H_