Mac: Show download item menu on mouse down instead of mouse up.

chrome/browser/cocoa/download_item_cell.h

 // Copyright (c) 2009 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_DOWNLOAD_ITEM_CELL_H_
 #define CHROME_BROWSER_COCOA_DOWNLOAD_ITEM_CELL_H_
 
 #import "base/cocoa_protocols_mac.h"
 #import "chrome/browser/cocoa/gradient_button_cell.h"
 
@@ skipping 34 matching lines @@
   scoped_nsobject<NSAnimation> hideStatusAnimation_;
 
   scoped_nsobject<GTMTheme> theme_;
 }
 
 - (void)setStateFromDownload:(BaseDownloadItemModel*)downloadModel;
 
 @property (copy) NSString* secondaryTitle;
 @property (retain) NSFont* secondaryFont;
 
-// Valid to call in response to a click of the cell's button. Returns if the
-// button part of the cell was clicked.
-- (BOOL)isButtonPartPressed;
+// Returns if the mouse is over the button part of the cell.
+- (BOOL)isMouseOverButtonPart;
 
 @end
 
 #endif  // CHROME_BROWSER_COCOA_DOWNLOAD_ITEM_CELL_H_