Remove search::GetSearchTerms since it always returns empty string

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

Index: chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm
diff --git a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm
index 7647a1a79956e0b22c3d4b634f852df8efc3e9a0..d7495ad63d057d316ddcd10f3b7cf907d6ca3b67 100644
--- a/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm
+++ b/chrome/browser/ui/cocoa/location_bar/autocomplete_text_field.mm
@@ -159,8 +159,7 @@ const CGFloat kAnimationDuration = 0.2;
     if (editor) {
       NSEvent* currentEvent = [NSApp currentEvent];
       if ([currentEvent type] == NSLeftMouseUp &&
-          ![editor selectedRange].length &&
-          (!observer_ || observer_->ShouldSelectAllOnMouseDown())) {
+          ![editor selectedRange].length) {
         [editor selectAll:nil];
       }
     }