Change PDF scaling factor from double to float.

chrome/browser/printing/pdf_to_emf_converter.h

 // Copyright 2014 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 CHROME_BROWSER_PRINTING_PDF_TO_EMF_CONVERTER_H_
 #define CHROME_BROWSER_PRINTING_PDF_TO_EMF_CONVERTER_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/memory/scoped_ptr.h"
 
 namespace base {
 class FilePath;
 }
 
 namespace printing {
 
 class MetafilePlayer;
 class PdfRenderSettings;
 
 class PdfToEmfConverter {
  public:
   typedef base::Callback<void(int page_count)> StartCallback;
   typedef base::Callback<void(int page_number,
-                              double scale_factor,
+                              float scale_factor,
                               scoped_ptr<MetafilePlayer> emf)> GetPageCallback;
 
   virtual ~PdfToEmfConverter();
 
   static scoped_ptr<PdfToEmfConverter> CreateDefault();
 
   // Starts conversion of PDF provided as |data|. Calls |start_callback|
   // with positive |page_count|. |page_count| is 0 if initialization failed.
   virtual void Start(const scoped_refptr<base::RefCountedMemory>& data,
                      const PdfRenderSettings& conversion_settings,
                      const StartCallback& start_callback) = 0;
 
   // Requests conversion of the page. |page_number| is 0-base page number in
   // PDF provided in Start() call.
   // Calls |get_page_callback| after conversion. |emf| of callback in not NULL
   // if conversion succeeded.
   virtual void GetPage(int page_number,
                        const GetPageCallback& get_page_callback) = 0;
 };
 
 }  // namespace printing
 
 #endif  // CHROME_BROWSER_PRINTING_PDF_TO_EMF_CONVERTER_H_