Remove search::GetSearchTerms since it always returns empty string

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

Index: chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm
index d837c4efa65d6f0992ef09537260d590337784d1..633e5cf09e7038bcbf0ce9299be1b7e2a49721e5 100644
--- a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm
+++ b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_editor.mm
@@ -168,12 +168,6 @@ BOOL ThePasteboardIsTooDamnBig() {
   [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 {
@@ -308,16 +302,6 @@ BOOL ThePasteboardIsTooDamnBig() {
 
     [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]);
@@ -586,11 +570,6 @@ BOOL ThePasteboardIsTooDamnBig() {
     DCHECK(observer);
     return observer->CanPasteAndGo();
   }
-  if ([item action] == @selector(showURL:)) {
-    AutocompleteTextFieldObserver* observer = [self observer];
-    DCHECK(observer);
-    return observer->ShouldEnableShowURL();
-  }
   return [super validateMenuItem:item];
 }