ugrr... Fixing printing scaling again.

printing/custom_scaling.h

Index: printing/custom_scaling.h
===================================================================
--- printing/custom_scaling.h	(revision 0)
+++ printing/custom_scaling.h	(revision 0)
@@ -0,0 +1,33 @@
+// Copyright (c) 2012 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_CUSTOM_SCALING_H_
+#define PRINTING_CUSTOM_SCALING_H_
+
+#include "printing/printing_export.h"
+
+namespace printing {
+
+// This set of function allows plugin to set custom printing scale in the
+// thread local storage. It is a hack to pass scale through this, but
+// alternative is to do major refactoring to pass this scale factor all the
+// from plugin through webkit to the upper level.
+// We should definitely revisit this approach in favor of better implementation
+// later. In the mean time, this looks like a simplest way fixing printing
+// issues now.
+
+// Gets custom printing scale from the TLS. Return false if it has not been
+// set.
+PRINTING_EXPORT bool GetCustomPrintingPageScale(double* scale);
+
+// Sets custom printing scale in TLS.
+PRINTING_EXPORT void SetCustomPrintingPageScale(double scale);
+
+// Clears custom printing scale in TLS.
+PRINTING_EXPORT void ClearCustomPrintingPageScale();
+
+}  // namespace printing
+
+#endif  // PRINTING_CUSTOM_SCALING_H_
+