Revert of Cleanup: Remove unused PrintSettings shrink factors.

components/printing/common/print_messages.h

 // 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.
 
 // IPC messages for printing.
 // Multiply-included message file, hence no include guard.
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 24 matching lines @@
 
   // Resets the members of the struct to 0.
   void Reset();
 
   gfx::Size page_size;
   gfx::Size content_size;
   gfx::Rect printable_area;
   int margin_top;
   int margin_left;
   double dpi;
+  double min_shrink;
+  double max_shrink;
   int desired_dpi;
   int document_cookie;
   bool selection_only;
   bool supports_alpha_blend;
   int32_t preview_ui_id;
   int preview_request_id;
   bool is_first_request;
   blink::WebPrintScalingOption print_scaling_option;
   bool print_to_pdf;
   bool display_header_footer;
@@ skipping 55 matching lines @@
 
   // The y-offset of the printable area, in pixels according to dpi.
   IPC_STRUCT_TRAITS_MEMBER(margin_top)
 
   // The x-offset of the printable area, in pixels according to dpi.
   IPC_STRUCT_TRAITS_MEMBER(margin_left)
 
   // Specifies dots per inch.
   IPC_STRUCT_TRAITS_MEMBER(dpi)
 
+  // Minimum shrink factor. See PrintSettings::min_shrink for more information.
+  IPC_STRUCT_TRAITS_MEMBER(min_shrink)
+
+  // Maximum shrink factor. See PrintSettings::max_shrink for more information.
+  IPC_STRUCT_TRAITS_MEMBER(max_shrink)
+
   // Desired apparent dpi on paper.
   IPC_STRUCT_TRAITS_MEMBER(desired_dpi)
 
   // Cookie for the document to ensure correctness.
   IPC_STRUCT_TRAITS_MEMBER(document_cookie)
 
   // Should only print currently selected text.
   IPC_STRUCT_TRAITS_MEMBER(selection_only)
 
   // Does the printer support alpha blending?
@@ skipping 341 matching lines @@
 
 // Tell the browser to show the print preview, when the document is sufficiently
 // loaded such that the renderer can determine whether it is modifiable or not.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_ShowScriptedPrintPreview,
                     bool /* is_modifiable */)
 
 // Notify the browser to set print presets based on source PDF document.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_SetOptionsFromDocument,
                     PrintHostMsg_SetOptionsFromDocument_Params /* params */)
 #endif  // defined(ENABLE_PRINT_PREVIEW)