Add GetMinimumSize() for Labels and ensure it's zero for empty Links.

ui/views/controls/link.h

Index: ui/views/controls/link.h
===================================================================
--- ui/views/controls/link.h	(revision 239550)
+++ ui/views/controls/link.h	(working copy)
@@ -33,13 +33,9 @@
   const LinkListener* listener() { return listener_; }
   void set_listener(LinkListener* listener) { listener_ = listener; }
 
-  // Overridden from View:
-  virtual void OnEnabledChanged() OVERRIDE;
+  // Label:
   virtual const char* GetClassName() const OVERRIDE;
   virtual gfx::NativeCursor GetCursor(const ui::MouseEvent& event) OVERRIDE;
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
-  virtual void OnFocus() OVERRIDE;
-  virtual void OnBlur() OVERRIDE;
   virtual bool HitTestRect(const gfx::Rect& rect) const OVERRIDE;
   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
   virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
@@ -46,17 +42,18 @@
   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseCaptureLost() OVERRIDE;
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
   virtual bool SkipDefaultKeyEventProcessing(
       const ui::KeyEvent& event) OVERRIDE;
   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
-
-  // Overridden from ui::EventHandler:
-  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
-
-  // Overridden from Label:
+  virtual void OnEnabledChanged() OVERRIDE;
+  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
+  virtual void OnFocus() OVERRIDE;
+  virtual void OnBlur() OVERRIDE;
   virtual void SetFont(const gfx::Font& font) OVERRIDE;
+  virtual void SetText(const string16& text) OVERRIDE;
+  virtual void SetEnabledColor(SkColor color) OVERRIDE;
 
-  virtual void SetEnabledColor(SkColor color) OVERRIDE;
   void SetPressedColor(SkColor color);
   void SetUnderline(bool underline);