Change OmniboxPopupTruncatingLabel to be based on UILabel.

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

 // Copyright (c) 2014 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 "ios/chrome/browser/ui/omnibox/omnibox_popup_material_view_controller.h"
 
 #include <memory>
 
 #include "base/ios/ios_util.h"
 #include "base/mac/scoped_cftyperef.h"
@@ skipping 56 matching lines @@
 }
 UIColor* BackgroundColorIncognito() {
   return [UIColor colorWithRed:(50 / 255.0)
                          green:(50 / 255.0)
                           blue:(50 / 255.0)
                          alpha:1.0];
 }
 }  // namespace
 
 @interface OmniboxPopupMaterialViewController () {
-  // CTFontRef's are needed for drawing attributed strings but are expensive
-  // to create. Since we only need four, we create them here and hold on to
-  // them.
-  base::ScopedCFTypeRef<CTFontRef> _smallFont;
-  base::ScopedCFTypeRef<CTFontRef> _bigFont;
-  base::ScopedCFTypeRef<CTFontRef> _smallBoldFont;
-  base::ScopedCFTypeRef<CTFontRef> _bigBoldFont;
-
   // Alignment of omnibox text. Popup text should match this alignment.
   NSTextAlignment _alignment;
 
   OmniboxPopupViewIOS* _popupView;  // weak, owns us
 
   // Fetcher for Answers in Suggest images.
   std::unique_ptr<web::ImageDataFetcher> imageFetcher_;
 
   // The data source.
   AutocompleteResult _currentResult;
@@ skipping 55 matching lines @@
   if (_incognito) {
     self.view.backgroundColor = BackgroundColorIncognito();
   } else {
     self.view.backgroundColor =
         IsIPadIdiom() ? BackgroundColorTablet() : BackgroundColorPhone();
   }
   [self.view setAutoresizingMask:(UIViewAutoresizingFlexibleWidth |
                                   UIViewAutoresizingFlexibleHeight)];
 
   // Cache fonts needed for omnibox attributed string.
-  UIFont* smallFont = [MDCTypography body1Font];
-  UIFont* bigFont = [MDCTypography subheadFont];
-  UIFont* smallBoldFont = [[MDFRobotoFontLoader sharedInstance]
-      mediumFontOfSize:smallFont.pointSize];
-  UIFont* bigBoldFont =
-      [[MDFRobotoFontLoader sharedInstance] mediumFontOfSize:bigFont.pointSize];
-  _smallFont.reset(CTFontCreateWithName((CFStringRef)smallFont.fontName,
-                                        smallFont.pointSize, NULL));
-  _bigFont.reset(CTFontCreateWithName((CFStringRef)bigFont.fontName,
-                                      bigFont.pointSize, NULL));
-  _smallBoldFont.reset(CTFontCreateWithName((CFStringRef)smallBoldFont.fontName,
-                                            smallBoldFont.pointSize, NULL));
-  _bigBoldFont.reset(CTFontCreateWithName((CFStringRef)bigBoldFont.fontName,
-                                          bigBoldFont.pointSize, NULL));
   NSMutableArray* rowsBuilder = [[[NSMutableArray alloc] init] autorelease];
   for (int i = 0; i < kRowCount; i++) {
     OmniboxPopupMaterialRow* row = [[[OmniboxPopupMaterialRow alloc]
         initWithIncognito:_incognito] autorelease];
     row.accessibilityIdentifier =
         [NSString stringWithFormat:@"omnibox suggestion %i", i];
     row.autoresizingMask = UIViewAutoresizingFlexibleWidth;
     [rowsBuilder addObject:row];
     [row.appendButton addTarget:self
                          action:@selector(appendButtonTapped:)
@@ skipping 11 matching lines @@
     [self.tableView setLayoutMargins:UIEdgeInsetsZero];
   }
   self.automaticallyAdjustsScrollViewInsets = NO;
   [self.tableView setContentInset:UIEdgeInsetsMake(kTopAndBottomPadding, 0,
                                                    kTopAndBottomPadding, 0)];
 }
 
 - (void)didReceiveMemoryWarning {
   [super didReceiveMemoryWarning];
   if (![self isViewLoaded]) {
-    _smallFont.reset();
-    _bigFont.reset();
-    _smallBoldFont.reset();
-    _bigBoldFont.reset();
     _rows.reset();
   }
 }
 
 - (void)traitCollectionDidChange:(UITraitCollection*)previousTraitCollection {
   [self layoutRows];
 }
 
 #pragma mark -
 #pragma mark Updating data and UI
@@ skipping 224 matching lines @@
                                                            type:field->type()]];
   }
 
   return result;
 }
 
 - (NSAttributedString*)attributedStringWithString:(const base::string16&)string
                                              type:(int)type {
   NSDictionary* attributes = nil;
 
-  const id font = (id)kCTFontAttributeName;
-  NSString* foregroundColor = (NSString*)kCTForegroundColorAttributeName;
+  const id font = (id)NSFontAttributeName;
+  NSString* foregroundColor = (NSString*)NSForegroundColorAttributeName;
   const id baselineOffset = (id)NSBaselineOffsetAttributeName;
 
   // Answer types, sizes and colors specified at http://goto.google.com/ais_api.
   switch (type) {
     case SuggestionAnswer::TOP_ALIGNED:
       attributes = @{
         font : [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:12],
         baselineOffset : @10.0f,
-        foregroundColor : (id)[UIColor grayColor].CGColor,
+        foregroundColor : [UIColor grayColor],
       };
       break;
     case SuggestionAnswer::DESCRIPTION_POSITIVE:
       attributes = @{
         font : [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:16],
-        foregroundColor : (id)[UIColor colorWithRed:11 / 255.0
-                                              green:128 / 255.0
-                                               blue:67 / 255.0
-                                              alpha:1.0]
-                              .CGColor,
+        foregroundColor : [UIColor colorWithRed:11 / 255.0
+                                          green:128 / 255.0
+                                           blue:67 / 255.0
+                                          alpha:1.0],
       };
       break;
     case SuggestionAnswer::DESCRIPTION_NEGATIVE:
       attributes = @{
         font : [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:16],
-        foregroundColor : (id)[UIColor colorWithRed:197 / 255.0
-                                              green:57 / 255.0
-                                               blue:41 / 255.0
-                                              alpha:1.0]
-                              .CGColor,
+        foregroundColor : [UIColor colorWithRed:197 / 255.0
+                                          green:57 / 255.0
+                                           blue:41 / 255.0
+                                          alpha:1.0],
       };
       break;
     case SuggestionAnswer::PERSONALIZED_SUGGESTION:
       attributes = @{
         font : [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:16],
       };
       break;
     case SuggestionAnswer::ANSWER_TEXT_MEDIUM:
       attributes = @{
         font : [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:20],
       };
       break;
     case SuggestionAnswer::ANSWER_TEXT_LARGE:
       attributes = @{
         font : [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:24],
       };
       break;
     case SuggestionAnswer::SUGGESTION_SECONDARY_TEXT_SMALL:
       attributes = @{
         font : [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:12],
-        foregroundColor : (id)[UIColor grayColor].CGColor,
+        foregroundColor : [UIColor grayColor],
       };
       break;
     case SuggestionAnswer::SUGGESTION_SECONDARY_TEXT_MEDIUM:
       attributes = @{
         font : [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:14],
-        foregroundColor : (id)[UIColor grayColor].CGColor,
+        foregroundColor : [UIColor grayColor],
       };
       break;
     case SuggestionAnswer::SUGGESTION:
     // Fall through.
     default:
       attributes = @{
         font : [[MDFRobotoFontLoader sharedInstance] regularFontOfSize:16],
       };
   }
 
@@ skipping 149 matching lines @@
 
 - (NSMutableAttributedString*)
 attributedStringWithString:(NSString*)text
            classifications:(const ACMatchClassifications*)classifications
                  smallFont:(BOOL)smallFont
                      color:(UIColor*)defaultColor
                   dimColor:(UIColor*)dimColor {
   if (text == nil)
     return nil;
 
-  CTFontRef fontRef = smallFont ? _smallFont : _bigFont;
+  UIFont* fontRef =
+      smallFont ? [MDCTypography body1Font] : [MDCTypography subheadFont];
 
   NSMutableAttributedString* as =
       [[[NSMutableAttributedString alloc] initWithString:text] autorelease];
 
   // Set the base attributes to the default font and color.
-  NSDictionary* dict = [NSDictionary
-      dictionaryWithObjectsAndKeys:(id)fontRef, (NSString*)kCTFontAttributeName,
-                                   defaultColor.CGColor,
-                                   (NSString*)kCTForegroundColorAttributeName,
-                                   nil];
+  NSDictionary* dict = @{
+    NSFontAttributeName : fontRef,
+    NSForegroundColorAttributeName : defaultColor,
+  };
   [as addAttributes:dict range:NSMakeRange(0, [text length])];
 
   if (classifications != NULL) {
-    CTFontRef boldFontRef = smallFont ? _smallBoldFont : _bigBoldFont;
+    UIFont* boldFontRef = [[MDFRobotoFontLoader sharedInstance]
+        mediumFontOfSize:fontRef.pointSize];
 
     for (ACMatchClassifications::const_iterator i = classifications->begin();
          i != classifications->end(); ++i) {
       const BOOL isLast = (i + 1) == classifications->end();
       const size_t nextOffset = (isLast ? [text length] : (i + 1)->offset);
       const NSInteger location = static_cast<NSInteger>(i->offset);
       const NSInteger length = static_cast<NSInteger>(nextOffset - i->offset);
       // Guard against bad, off-the-end classification ranges due to
       // crbug.com/121703 and crbug.com/131370.
       if (i->offset + length > [text length] || length <= 0)
         break;
       const NSRange range = NSMakeRange(location, length);
       if (0 != (i->style & ACMatchClassification::MATCH)) {
-        [as addAttribute:(id)kCTFontAttributeName
-                   value:(id)boldFontRef
-                   range:range];
+        [as addAttribute:NSFontAttributeName value:boldFontRef range:range];
       }
 
       if (0 != (i->style & ACMatchClassification::DIM)) {
-        [as addAttribute:(id)kCTForegroundColorAttributeName
-                   value:(id)dimColor.CGColor
+        [as addAttribute:NSForegroundColorAttributeName
+                   value:dimColor
                    range:range];
       }
     }
   }
   return as;
 }
 
 #pragma mark -
 #pragma mark Table view delegate
 
@@ skipping 56 matching lines @@
     // The delete button never disappears if you don't call this after a tap.
     // It doesn't seem to be required anywhere else.
     [_rows[indexPath.row] prepareForReuse];
     const AutocompleteMatch& match =
         ((const AutocompleteResult&)_currentResult).match_at(indexPath.row);
     _popupView->DeleteMatch(match);
   }
 }
 
 @end