Add printing.dll to the component build.

printing/page_setup.h

 // Copyright (c) 2011 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 PRINTING_PAGE_SETUP_H_
 #define PRINTING_PAGE_SETUP_H_
 
+#include "printing/printing_export.h"
 #include "ui/gfx/rect.h"
 
 namespace printing {
 
 // Margins for a page setup.
-class PageMargins {
+class PRINTING_EXPORT PageMargins {
  public:
   PageMargins();
 
   void Clear();
 
   // Equality operator.
   bool Equals(const PageMargins& rhs) const;
 
   // Vertical space for the overlay from the top of the sheet.
   int header;
   // Vertical space for the overlay from the bottom of the sheet.
   int footer;
   // Margin on each side of the sheet.
   int left;
   int right;
   int top;
   int bottom;
 };
 
 // Settings that define the size and printable areas of a page. Unit is
 // unspecified.
-class PageSetup {
+class PRINTING_EXPORT PageSetup {
  public:
   PageSetup();
   ~PageSetup();
 
   void Clear();
 
   // Equality operator.
   bool Equals(const PageSetup& rhs) const;
 
   void Init(const gfx::Size& physical_size, const gfx::Rect& printable_area,
@@ skipping 32 matching lines @@
   // Requested margins.
   PageMargins requested_margins_;
 
   // Space that must be kept free for the overlays.
   int text_height_;
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PAGE_SETUP_H_