Add a dialog for getting user consent in the echo redeem flow.

ui/views/controls/styled_label.h

 // Copyright 2013 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.
 
 #ifndef UI_VIEWS_CONTROLS_STYLED_LABEL_H_
 #define UI_VIEWS_CONTROLS_STYLED_LABEL_H_
 
 #include <map>
 #include <queue>
 
@@ skipping 13 matching lines @@
 // always multiline, and the only style that may be applied is linkifying ranges
 // of text.
 class VIEWS_EXPORT StyledLabel : public View, public LinkListener {
  public:
   StyledLabel(const string16& text, StyledLabelListener* listener);
   virtual ~StyledLabel();
 
   // Marks the given range within |text_| as a link.
   void AddLink(const ui::Range& range);
 
+  // Resizes the label to the given width and height big enough to display the
+  // label text.
+  void SizeToFit(int width);
+
   // View implementation:
   virtual gfx::Insets GetInsets() const OVERRIDE;
+  virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual int GetHeightForWidth(int w) OVERRIDE;
   virtual void Layout() OVERRIDE;
 
   // LinkListener implementation:
   virtual void LinkClicked(Link* source, int event_flags) OVERRIDE;
 
  private:
   struct LinkRange {
     explicit LinkRange(const ui::Range& range) : range(range) {}
     ~LinkRange() {}
@@ skipping 24 matching lines @@
   // This variable saves the result of the last GetHeightForWidth call in order
   // to avoid repeated calculation.
   gfx::Size calculated_size_;
 
   DISALLOW_COPY_AND_ASSIGN(StyledLabel);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_STYLED_LABEL_H_