[ios] More tweaks to content suggestions icons, font and blur.

Bug: 819223
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I41edb5310f0529f9d770f5b415cd6f5179a89d1a
Reviewed-on: https://chromium-review.googlesource.com/980672Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Commit-Queue: Justin Cohen <justincohen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546098}

ios/chrome/browser/ui/content_suggestions/cells/content_suggestions_learn_more_item.mm

@@ -112,8 +112,11 @@ const int kLinkColorRGB = 0x5595FE;
 + (void)configureLabel:(UILabel*)label withText:(NSString*)text {
   label.numberOfLines = 0;
   label.textColor = [[MDCPalette greyPalette] tint700];
-  label.font = [MDCTypography italicFontFromFont:[MDCTypography captionFont]];
-
+  if (IsUIRefreshPhase1Enabled()) {
+    label.font = [UIFont preferredFontForTextStyle:UIFontTextStyleFootnote];
+  } else {
+    label.font = [MDCTypography italicFontFromFont:[MDCTypography captionFont]];
+  }
   NSRange linkRange;
   NSString* strippedText = ParseStringWithLink(text, &linkRange);
   DCHECK_NE(NSNotFound, static_cast<NSInteger>(linkRange.location));

ios/chrome/browser/ui/content_suggestions/content_suggestions_header_view.mm

@@ -83,8 +83,9 @@ const CGFloat kSearchIconLeftMargin = 9;
 }
 
 - (void)addViewsToSearchField:(UIView*)searchField {
-  UIBlurEffect* blurEffect = [[ToolbarButtonFactory alloc] initWithStyle:NORMAL]
-                                 .toolbarConfiguration.blurEffect;
+  ToolbarButtonFactory* buttonFactory =
+      [[ToolbarButtonFactory alloc] initWithStyle:NORMAL];
+  UIBlurEffect* blurEffect = buttonFactory.toolbarConfiguration.blurEffect;
   UIVisualEffectView* blur =
       [[UIVisualEffectView alloc] initWithEffect:blurEffect];
   blur.layer.cornerRadius = kAdaptiveLocationBarCornerRadius;
@@ -92,12 +93,20 @@ const CGFloat kSearchIconLeftMargin = 9;
   blur.translatesAutoresizingMaskIntoConstraints = NO;
   AddSameConstraints(blur, searchField);
 
+  UIVisualEffect* vibrancy = [buttonFactory.toolbarConfiguration
+      vibrancyEffectForBlurEffect:blurEffect];
+  UIVisualEffectView* vibrancyView =
+      [[UIVisualEffectView alloc] initWithEffect:vibrancy];
+  [searchField insertSubview:vibrancyView atIndex:1];
+  vibrancyView.translatesAutoresizingMaskIntoConstraints = NO;
+  AddSameConstraints(vibrancyView, searchField);
+
   UIView* backgroundContainer = [[UIView alloc] init];
   backgroundContainer.userInteractionEnabled = NO;
   backgroundContainer.backgroundColor =
       UIColorFromRGB(content_suggestions::kSearchFieldBackgroundColor);
   backgroundContainer.layer.cornerRadius = kAdaptiveLocationBarCornerRadius;
-  [searchField insertSubview:backgroundContainer atIndex:1];
+  [vibrancyView.contentView addSubview:backgroundContainer];
 
   backgroundContainer.translatesAutoresizingMaskIntoConstraints = NO;
   self.backgroundLeadingConstraint = [backgroundContainer.leadingAnchor
@@ -116,7 +125,7 @@ const CGFloat kSearchIconLeftMargin = 9;
 
   UIImage* search_icon = [UIImage imageNamed:@"ntp_search_icon"];
   UIImageView* search_view = [[UIImageView alloc] initWithImage:search_icon];
-  [searchField addSubview:search_view];
+  [vibrancyView.contentView addSubview:search_view];
   search_view.translatesAutoresizingMaskIntoConstraints = NO;
   [NSLayoutConstraint activateConstraints:@[
     [search_view.centerYAnchor