Add printing.dll to the component build.

printing/pdf_metafile_cg_mac.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_PDF_METAFILE_CG_MAC_H_
 #define PRINTING_PDF_METAFILE_CG_MAC_H_
 
 #include <ApplicationServices/ApplicationServices.h>
 #include <CoreFoundation/CoreFoundation.h>
 
 #include "base/basictypes.h"
 #include "base/gtest_prod_util.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/threading/thread_checker.h"
 #include "printing/metafile.h"
 
 class FilePath;
 
 namespace gfx {
 class Rect;
 class Size;
 class Point;
 }
 
 namespace printing {
 
 // This class creates a graphics context that renders into a PDF data stream.
-class PdfMetafileCg : public Metafile, public base::ThreadChecker {
+class PRINTING_EXPORT PdfMetafileCg : public Metafile {
  public:
   PdfMetafileCg();
   virtual ~PdfMetafileCg();
 
   // Metafile methods.
   virtual bool Init();
   virtual bool InitFromData(const void* src_buffer, uint32 src_buffer_size);
 
   // Not implemented on mac.
   virtual SkDevice* StartPageForVectorCanvas(
@@ skipping 23 matching lines @@
                           const CGRect rect,
                           bool shrink_to_fit,
                           bool stretch_to_fit,
                           bool center_horizontally,
                           bool center_vertically) const;
 
  private:
   // Returns a CGPDFDocumentRef version of pdf_data_.
   CGPDFDocumentRef GetPDFDocument() const;
 
+  base::ThreadChecker thread_checker_;
+
   // Context for rendering to the pdf.
   base::mac::ScopedCFTypeRef<CGContextRef> context_;
 
   // PDF backing store.
   base::mac::ScopedCFTypeRef<CFMutableDataRef> pdf_data_;
 
   // Lazily-created CGPDFDocument representation of pdf_data_.
   mutable base::mac::ScopedCFTypeRef<CGPDFDocumentRef> pdf_doc_;
 
   // Whether or not a page is currently open.
   bool page_is_open_;
 
   // Whether this instantiation of the PdfMetafileCg owns the thread_pdf_docs.
   bool thread_pdf_docs_owned_;
 
   DISALLOW_COPY_AND_ASSIGN(PdfMetafileCg);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PDF_METAFILE_CG_MAC_H_