Remove the use of custom logic to determine search suggestion types.

ios/chrome/browser/ui/omnibox/omnibox_popup_material_view_controller.mm

Index: ios/chrome/browser/ui/omnibox/omnibox_popup_material_view_controller.mm
diff --git a/ios/chrome/browser/ui/omnibox/omnibox_popup_material_view_controller.mm b/ios/chrome/browser/ui/omnibox/omnibox_popup_material_view_controller.mm
index 2c8477999ce16d7e20f8f479edb09c4a45e89fc3..ca1a193a9cd4e103a974747ceb7be374d608fdae 100644
--- a/ios/chrome/browser/ui/omnibox/omnibox_popup_material_view_controller.mm
+++ b/ios/chrome/browser/ui/omnibox/omnibox_popup_material_view_controller.mm
@@ -285,7 +285,7 @@ initWithPopupView:(OmniboxPopupViewIOS*)view
   // suggestions. For all other search suggestions, |match.description| is the
   // name of the currently selected search engine, which for mobile we suppress.
   NSString* detailText = nil;
-  if (![self isSearchMatch:match.type])
+  if (!AutocompleteMatch::IsSearchType(match.type))
     detailText = base::SysUTF16ToNSString(match.contents);
   else if (match.type == AutocompleteMatchType::SEARCH_SUGGEST_ENTITY)
     detailText = base::SysUTF16ToNSString(match.description);
@@ -304,7 +304,8 @@ initWithPopupView:(OmniboxPopupViewIOS*)view
       detailTextLabel.numberOfLines = 1;
   } else {
     const ACMatchClassifications* classifications =
-        ![self isSearchMatch:match.type] ? &match.contents_class : nil;
+        !AutocompleteMatch::IsSearchType(match.type) ? &match.contents_class
+                                                     : nil;
     // The suggestion detail color should match the main text color for entity
     // suggestions. For non-search suggestions (URLs), a highlight color is used
     // instead.
@@ -334,12 +335,13 @@ initWithPopupView:(OmniboxPopupViewIOS*)view
 
   // The text should be search term (|match.contents|) for searches, otherwise
   // page title (|match.description|).
-  base::string16 textString =
-      [self isSearchMatch:match.type] ? match.contents : match.description;
+  base::string16 textString = AutocompleteMatch::IsSearchType(match.type)
+                                  ? match.contents
+                                  : match.description;
   NSString* text = base::SysUTF16ToNSString(textString);
   const ACMatchClassifications* textClassifications =
-      [self isSearchMatch:match.type] ? &match.contents_class
-                                      : &match.description_class;
+      AutocompleteMatch::IsSearchType(match.type) ? &match.contents_class
+                                                  : &match.description_class;
 
   // If for some reason the title is empty, copy the detailText.
   if ([text length] == 0 && [detailText length] != 0) {
@@ -669,15 +671,6 @@ initWithPopupView:(OmniboxPopupViewIOS*)view
   _alignment = alignment;
 }
 
-- (BOOL)isSearchMatch:(const AutocompleteMatch::Type&)type {
-  return (type == AutocompleteMatchType::NAVSUGGEST ||
-          type == AutocompleteMatchType::SEARCH_WHAT_YOU_TYPED ||
-          type == AutocompleteMatchType::SEARCH_HISTORY ||
-          type == AutocompleteMatchType::SEARCH_SUGGEST ||
-          type == AutocompleteMatchType::SEARCH_SUGGEST_ENTITY ||
-          type == AutocompleteMatchType::SEARCH_OTHER_ENGINE);
-}
-
 - (NSMutableAttributedString*)
 attributedStringWithString:(NSString*)text
            classifications:(const ACMatchClassifications*)classifications