[Mac] Allow omnibox decorations to decline mouse events.

chrome/browser/cocoa/location_bar/autocomplete_text_field_cell.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.
 
 #include <vector>
 
 #import <Cocoa/Cocoa.h>
 
 #import "chrome/browser/cocoa/styled_text_field_cell.h"
 
@@ skipping 64 matching lines @@
 - (NSMenu*)decorationMenuForEvent:(NSEvent*)theEvent
                            inRect:(NSRect)cellFrame
                            ofView:(AutocompleteTextField*)controlView;
 
 // Called by |AutocompleteTextField| to let page actions intercept
 // clicks.  Returns |YES| if the click has been intercepted.
 - (BOOL)mouseDown:(NSEvent*)theEvent
            inRect:(NSRect)cellFrame
            ofView:(AutocompleteTextField*)controlView;
 
+// Overridden from StyledTextFieldCell to include decorations adjacent
+// to the text area which don't handle mouse clicks themselves.
+// Keyword-search bubble, for instance.
+- (NSRect)textCursorFrameForFrame:(NSRect)cellFrame;
+
 @end
 
 // Internal methods here exposed for unit testing.
 @interface AutocompleteTextFieldCell (UnitTesting)
 
 @property(nonatomic, readonly) NSAttributedString* hintString;
 @property(nonatomic, readonly) NSAttributedString* hintIconLabel;
 
 @end