Moved SimplifyDocumentTitle from printing/backend

TBR=noamsml

Review URL: https://codereview.chromium.org/59903019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@234127 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/printing/printing_context_win.cc b/printing/printing_context_win.cc
index 76d96bf2..d33394e 100644
--- a/printing/printing_context_win.cc
+++ b/printing/printing_context_win.cc
@@ -22,6 +22,7 @@
 #include "printing/print_job_constants.h"
 #include "printing/print_settings_initializer_win.h"
 #include "printing/printed_document.h"
+#include "printing/printing_utils.h"
 #include "printing/units.h"
 #include "skia/ext/platform_device.h"
 #include "win8/util/win8_util.h"
@@ -431,7 +432,7 @@
   if (SP_ERROR == SetAbortProc(context_, &AbortProc))
     return OnError();
 
-  DCHECK(PrintBackend::SimplifyDocumentTitle(document_name) == document_name);
+  DCHECK(SimplifyDocumentTitle(document_name) == document_name);
   DOCINFO di = { sizeof(DOCINFO) };
   const std::wstring& document_name_wide = UTF16ToWide(document_name);
   di.lpszDocName = document_name_wide.c_str();