Views: Don't add insets for views::Link focus rings under MD.

ui/views/controls/link.h

Index: ui/views/controls/link.h
diff --git a/ui/views/controls/link.h b/ui/views/controls/link.h
index 928a727664d7377fc3b6ac0bc359279bb4f9db13..448adc5536125644679f51930ce13b583348bb90 100644
--- a/ui/views/controls/link.h
+++ b/ui/views/controls/link.h
@@ -25,14 +25,35 @@ class LinkListener;
 ////////////////////////////////////////////////////////////////////////////////
 class VIEWS_EXPORT Link : public Label {
  public:
+  static const char kViewClassName[];
+
+  // The padding for the focus ring border when rendering a focused Link with
+  // FocusStyle::RING.
+  static constexpr int kFocusBorderPadding = 1;
+
+  // How the Link is styled when focused.
+  enum class FocusStyle {
+    UNDERLINE,  // An underline style is added to the text only when focused.
+    RING,       // A focus ring is drawn around the View.
+  };
+
   Link();
   explicit Link(const base::string16& title);
   ~Link() override;
 
+  // Returns the default FocusStyle for a views::Link. Calling SetUnderline()
+  // may change it: E.g. SetUnderline(true) forces FocusStyle::RING.
+  static FocusStyle GetDefaultFocusStyle();
+
+  // Returns the current FocusStyle of this Link.
+  FocusStyle GetFocusStyle() const;
+
   const LinkListener* listener() { return listener_; }
   void set_listener(LinkListener* listener) { listener_ = listener; }
 
   // Label:
+  void PaintFocusRing(gfx::Canvas* canvas) const override;
+  gfx::Insets GetInsets() const override;
   const char* GetClassName() const override;
   gfx::NativeCursor GetCursor(const ui::MouseEvent& event) override;
   bool CanProcessEventsWithinSubtree() const override;
@@ -55,10 +76,10 @@ class VIEWS_EXPORT Link : public Label {
 
   // TODO(estade): almost all the places that call this pass false. With
   // Harmony, false is already the default so those callsites can be removed.
+  // TODO(tapted): Then remove all callsites when client code sets a correct
+  // typography style and derives this from style::GetFont(STYLE_LINK).
   void SetUnderline(bool underline);
 
-  static const char kViewClassName[];
-
  private:
   void Init();