Remove search::GetSearchTerms since it always returns empty string

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

 // Copyright (c) 2011 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 "chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.h"
 
 #include "base/mac/sdk_forward_declarations.h"
 #include "base/strings/string_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"  // IDC_*
@@ skipping 150 matching lines @@
   DCHECK(observer);
   if (observer && observer->CanCopy())
     observer->CopyToPasteboard([NSPasteboard generalPasteboard]);
 }
 
 - (void)cut:(id)sender {
   [self copy:sender];
   [self delete:nil];
 }
 
-- (void)showURL:(id)sender {
-  AutocompleteTextFieldObserver* observer = [self observer];
-  DCHECK(observer);
-  observer->ShowURL();
-}
-
 // This class assumes that the delegate is an AutocompleteTextField.
 // Enforce that assumption.
 - (AutocompleteTextField*)delegate {
   AutocompleteTextField* delegate =
       static_cast<AutocompleteTextField*>([super delegate]);
   DCHECK(delegate == nil ||
          [delegate isKindOfClass:[AutocompleteTextField class]]);
   return delegate;
 }
 
@@ skipping 114 matching lines @@
       NSString* pasteAndGoLabel =
           l10n_util::GetNSStringWithFixup(observer->GetPasteActionStringId());
       DCHECK([pasteAndGoLabel length]);
       [menu addItemWithTitle:pasteAndGoLabel
                       action:@selector(pasteAndGo:)
                keyEquivalent:@""];
     }
 
     [menu addItem:[NSMenuItem separatorItem]];
 
-    // Display a "Show URL" option if search term replacement is active.
-    if (observer->ShouldEnableShowURL()) {
-      NSString* showURLLabel =
-          l10n_util::GetNSStringWithFixup(IDS_SHOW_URL_MAC);

[Peter Kasting, 2016/08/13 05:03:44]

This was the only use of this string, so it should be removed.

[Marc Treib, 2016/08/16 12:00:17]

Done. (I have a follow-up CL almost ready that'll remove the corresponding
non-MAC stuff too.)

-      DCHECK([showURLLabel length]);
-      [menu addItemWithTitle:showURLLabel
-                      action:@selector(showURL:)
-               keyEquivalent:@""];
-    }
-
     NSString* searchEngineLabel =
         l10n_util::GetNSStringWithFixup(IDS_EDIT_SEARCH_ENGINES);
     DCHECK([searchEngineLabel length]);
     NSMenuItem* item = [menu addItemWithTitle:searchEngineLabel
                                        action:@selector(commandDispatch:)
                                 keyEquivalent:@""];
     [item setTag:IDC_EDIT_SEARCH_ENGINES];
   }
 
   return menu;
@@ skipping 248 matching lines @@
 - (BOOL)validateMenuItem:(NSMenuItem*)item {
   if ([item action] == @selector(copyToFindPboard:))
     return [self selectedRange].length > 0;
   if ([item action] == @selector(pasteAndGo:)) {
     // TODO(rohitrao): If the clipboard is empty, should we show a
     // greyed-out "Paste and Go" or nothing at all?
     AutocompleteTextFieldObserver* observer = [self observer];
     DCHECK(observer);
     return observer->CanPasteAndGo();
   }
-  if ([item action] == @selector(showURL:)) {
-    AutocompleteTextFieldObserver* observer = [self observer];
-    DCHECK(observer);
-    return observer->ShouldEnableShowURL();
-  }
   return [super validateMenuItem:item];
 }
 
 - (void)copyToFindPboard:(id)sender {
   NSRange selectedRange = [self selectedRange];
   if (selectedRange.length == 0)
     return;
   NSAttributedString* selection =
       [self attributedSubstringForProposedRange:selectedRange
                                     actualRange:NULL];
@@ skipping 22 matching lines @@
   if (!ui::MaterialDesignController::IsModeMaterial()) {
     return;
   }
   [self updateColorsToMatchTheme];
 }
 
 - (void)windowDidChangeActive {
 }
 
 @end