Cleanup: Remove "gray text" logic from Omnibox

components/omnibox/browser/omnibox_edit_unittest.cc

 // 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.
 
 #include <stddef.h>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 62 matching lines @@
   void OnInlineAutocompleteTextCleared() override {
     inline_autocomplete_text_.clear();
   }
   void OnRevertTemporaryText() override {}
   void OnBeforePossibleChange() override {}
   bool OnAfterPossibleChange(bool allow_keyword_ui_change) override {
     return false;
   }
   gfx::NativeView GetNativeView() const override { return nullptr; }
   gfx::NativeView GetRelativeWindowForPopup() const override { return nullptr; }
-  void SetGrayTextAutocompletion(const base::string16& input) override {}
-  base::string16 GetGrayTextAutocompletion() const override {
-    return base::string16();
-  }
   int GetTextWidth() const override { return 0; }
   int GetWidth() const override { return 0; }
   bool IsImeComposing() const override { return false; }
   int GetOmniboxTextLength() const override { return 0; }
   void EmphasizeURLComponents() override {}
 
   const base::string16& inline_autocomplete_text() const {
     return inline_autocomplete_text_;
   }
 
@@ skipping 289 matching lines @@
                      alternate_nav_url, base::string16(), 0);
   EXPECT_TRUE(AutocompleteInput::HasHTTPScheme(
       client->alternate_nav_match().fill_into_edit));
 
   model()->SetUserText(base::ASCIIToUTF16("abcd"));
   model()->OpenMatch(match, WindowOpenDisposition::CURRENT_TAB,
                      alternate_nav_url, base::string16(), 0);
   EXPECT_TRUE(AutocompleteInput::HasHTTPScheme(
       client->alternate_nav_match().fill_into_edit));
 }