[rAC, OSX] Use a bubble for tooltips.

chrome/browser/ui/cocoa/autofill/autofill_tooltip_controller.h

+// Copyright 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_UI_COCOA_AUTOFILL_AUTOFILL_TOOLTIP_CONTROLLER_H_
+#define CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_TOOLTIP_CONTROLLER_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/mac/scoped_nsobject.h"
+
+@class AutofillBubbleController;
+@class AutofillTooltip;
+
+@protocol AutofillTooltipDelegate
+- (void)didBeginHover;
+- (void)didEndHover;
+@end
+
+// Controller for the Tooltip view, which handles displaying/hiding the
+// tooltip bubble on hover.
+@interface AutofillTooltipController
+    : NSViewController<AutofillTooltipDelegate> {
+ @private
+  base::scoped_nsobject<AutofillTooltip> view_;
+  AutofillBubbleController* bubbleController_;
+  NSString* message_;
+}
+
+// |message| to display in the tooltip.
+@property(copy, nonatomic) NSString* message;
+
+- (id)init;
+- (void)setImage:(NSImage*)image;
+
+@end;
+
+#endif  // CHROME_BROWSER_UI_COCOA_AUTOFILL_AUTOFILL_TOOLTIP_CONTROLLER_H_