Unify the three places that patch font loading for PDFium on Windows.

chrome/child/pdf_child_init.h

Index: chrome/child/pdf_child_init.h
diff --git a/chrome/common/chrome_version.cc.version b/chrome/child/pdf_child_init.h
similarity index 50%
copy from chrome/common/chrome_version.cc.version
copy to chrome/child/pdf_child_init.h
index 54e062bb931046619a1e1a53298d2cbccbecccad..1aac5c6fbce211469b2f8eb45e6da0bfe1e91dc1 100644
--- a/chrome/common/chrome_version.cc.version
+++ b/chrome/child/pdf_child_init.h
@@ -2,10 +2,14 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/common/chrome_constants.h"
+#ifndef CHROME_CHILD_PDF_CHILD_INIT_H_
+#define CHROME_CHILD_PDF_CHILD_INIT_H_
 
 namespace chrome {
 
-const char kChromeVersion[] = "@MAJOR@.@MINOR@.@BUILD@.@PATCH@";
+// Initializes child-process specific code for the PDF module.
+void InitializePDF();
 
 }  // namespace chrome
+
+#endif  // CHROME_CHILD_PDF_CHILD_INIT_H_