Use the Mac omnibox field's font as the basis for the fonts used in the field and popup.

chrome/browser/autocomplete/autocomplete_edit_view_mac.mm

 // 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.
 
 #include "chrome/browser/autocomplete/autocomplete_edit_view_mac.h"
 
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/autocomplete/autocomplete_edit.h"
 #include "chrome/browser/autocomplete/autocomplete_popup_model.h"
 #include "chrome/browser/autocomplete/autocomplete_popup_view_mac.h"
@@ skipping 221 matching lines @@
   // editor, and check it's selected range against its length.
   model_->StartAutocomplete(false);
 }
 
 void AutocompleteEditViewMac::ClosePopup() {
   popup_view_->GetModel()->StopAutocomplete();
 }
 
 void AutocompleteEditViewMac::UpdateAndStyleText(
     const std::wstring& display_text, size_t user_text_length) {
+  NSDictionary* attributes = [NSDictionary dictionaryWithObjectsAndKeys:
+                                  [field_ font], NSFontAttributeName,
+                                  nil];
   NSString* ss = base::SysWideToNSString(display_text);
   NSMutableAttributedString* as =
-      [[[NSMutableAttributedString alloc] initWithString:ss] autorelease];
+      [[[NSMutableAttributedString alloc] initWithString:ss
+                                              attributes:attributes]
+        autorelease];
 
   url_parse::Parsed parts;
   AutocompleteInput::Parse(display_text, model_->GetDesiredTLD(),
                            &parts, NULL);
   bool emphasize = model_->CurrentTextIsURL() && (parts.host.len > 0);
   if (emphasize) {
     // TODO(shess): Pull color out as a constant.
     [as addAttribute:NSForegroundColorAttributeName
                value:[NSColor greenColor]
                range:NSMakeRange((NSInteger)parts.host.begin,
@@ skipping 195 matching lines @@
 }
 
 - (void)controlTextDidEndEditing:(NSNotification*)aNotification {
   edit_view_->OnKillFocus();
 
   // TODO(shess): Figure out where the selection belongs.  On GTK,
   // it's set to the start of the text.
 }
 
 @end