Migrate LinkExample to the Builder and Add Builder Support for Link

BUG=1130078

Change-Id: I41b8a046ed0a392d8df41a747286e346d57cb385
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2454095
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Auto-Submit: Robert Liao <robliao@chromium.org>
Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#814697}

ui/views/controls/link.h

@@ -14,6 +14,7 @@
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/gfx/color_palette.h"
 #include "ui/views/controls/label.h"
+#include "ui/views/metadata/view_factory.h"
 #include "ui/views/style/typography.h"
 
 namespace views {
@@ -104,6 +105,9 @@ class VIEWS_EXPORT Link : public Label {
   DISALLOW_COPY_AND_ASSIGN(Link);
 };
 
+BEGIN_VIEW_BUILDER(VIEWS_EXPORT, Link, Label)
+END_VIEW_BUILDER(VIEWS_EXPORT, Link)
+
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_LINK_H_

ui/views/examples/link_example.cc

@@ -13,6 +13,7 @@
 #include "ui/views/examples/examples_window.h"
 #include "ui/views/examples/grit/views_examples_resources.h"
 #include "ui/views/layout/fill_layout.h"
+#include "ui/views/metadata/view_factory.h"
 #include "ui/views/view.h"
 
 using l10n_util::GetStringUTF16;
@@ -27,8 +28,9 @@ LinkExample::LinkExample()
 LinkExample::~LinkExample() = default;
 
 void LinkExample::CreateExampleView(View* container) {
-  auto link =
-      std::make_unique<Link>(GetStringUTF16(IDS_LINK_CLICK_PROMPT_LABEL));
+  auto link = views::Builder<Link>()
+                  .SetText(GetStringUTF16(IDS_LINK_CLICK_PROMPT_LABEL))
+                  .Build();
   link->set_callback(base::BindRepeating(
       &LogStatus, GetStringUTF8(IDS_LINK_CLICK_CONFIRMED_LABEL)));