[MD] some tweaks to download shelf

ui/gfx/geometry/insets_f.h

 // Copyright (c) 2012 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_GFX_GEOMETRY_INSETS_F_H_
 #define UI_GFX_GEOMETRY_INSETS_F_H_
 
 #include <string>
 
 #include "ui/gfx/gfx_export.h"
 
 namespace gfx {
 
-// A floating versin of gfx::Insets.
+// A floating point version of gfx::Insets.
 class GFX_EXPORT InsetsF {
  public:
   InsetsF();
   InsetsF(float top, float left, float bottom, float right);
   ~InsetsF();
 
   float top() const { return top_; }
   float left() const { return left_; }
   float bottom() const { return bottom_; }
   float right() const { return right_; }
@@ skipping 42 matching lines @@
  private:
   float top_;
   float left_;
   float bottom_;
   float right_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_GEOMETRY_INSETS_F_H_