Use Lucida Grande instead of Helvetica for "Show all downloads..." link in download shelf.

chrome/browser/cocoa/download_shelf_controller.mm

Index: chrome/browser/cocoa/download_shelf_controller.mm
diff --git a/chrome/browser/cocoa/download_shelf_controller.mm b/chrome/browser/cocoa/download_shelf_controller.mm
index a2fba892162597feb1aef8b341c45a58eb65f53c..16fc0c7755a804174a6cdcc7083d7ff3f85d09d3 100644
--- a/chrome/browser/cocoa/download_shelf_controller.mm
+++ b/chrome/browser/cocoa/download_shelf_controller.mm
@@ -71,10 +71,13 @@ const NSTimeInterval kDownloadItemOpenDuration = 0.8;
       [[NSParagraphStyle defaultParagraphStyle] mutableCopy]);
   [paragraphStyle.get() setAlignment:NSRightTextAlignment];
 
+  NSFont* font = [NSFont systemFontOfSize:
+      [NSFont systemFontSizeForControlSize:NSRegularControlSize]];
   NSDictionary* linkAttributes = [NSDictionary dictionaryWithObjectsAndKeys:
       @"", NSLinkAttributeName,
       [NSCursor pointingHandCursor], NSCursorAttributeName,
       paragraphStyle.get(), NSParagraphStyleAttributeName,
+      font, NSFontAttributeName,
       nil];
   NSString* text =
       base::SysWideToNSString(l10n_util::GetString(IDS_SHOW_ALL_DOWNLOADS));