Cleanup: Remove "gray text" logic from Omnibox

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_unittest.mm

 // Copyright (c) 2012 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.
 
 #import <ApplicationServices/ApplicationServices.h>
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/cocoa_test_helper.h"
@@ skipping 225 matching lines @@
 
 // Test drawing, mostly to ensure nothing leaks or crashes.
 TEST_F(AutocompleteTextFieldTest, Display) {
   [field_ display];
 
   // Test focussed drawing.
   [test_window() makePretendKeyWindowAndSetFirstResponder:field_];
   [field_ display];
 }
 
-// Test setting gray text, mostly to ensure nothing leaks or crashes.
-TEST_F(AutocompleteTextFieldTest, GrayText) {
-  [field_ display];
-  EXPECT_FALSE([field_ needsDisplay]);
-  [field_ setGrayTextAutocompletion:@"foo" textColor:[NSColor redColor]];
-  EXPECT_TRUE([field_ needsDisplay]);
-  [field_ display];
-}
-
 TEST_F(AutocompleteTextFieldObserverTest, FlagsChanged) {
   InSequence dummy;  // Call mock in exactly the order specified.
 
   // Test without Control key down, but some other modifier down.
   EXPECT_CALL(field_observer_, OnControlKeyChanged(false));
   [field_ flagsChanged:KeyDownEventWithFlags(NSShiftKeyMask)];
 
   // Test with Control key down.
   EXPECT_CALL(field_observer_, OnControlKeyChanged(true));
   [field_ flagsChanged:KeyDownEventWithFlags(NSControlKeyMask)];
@@ skipping 668 matching lines @@
   base::scoped_nsobject<AutocompleteTextField> pin([field_ retain]);
   [field_ removeFromSuperview];
   [test_window() resignKeyWindow];
 
   [[test_window() contentView] addSubview:field_];
   EXPECT_CALL(field_observer_, ClosePopup());
   [test_window() resignKeyWindow];
 }
 
 }  // namespace