Revert of Cleanup: Remove unused PrintSettings shrink factors.

components/printing/renderer/print_web_view_helper.cc

 // 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.
 
 #include "components/printing/renderer/print_web_view_helper.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string>
 #include <utility>
@@ skipping 93 matching lines @@
   // on dpi.
   return kPointsPerInch;
 #else
   return static_cast<int>(print_params->dpi);
 #endif  // defined(OS_MACOSX)
 }
 
 bool PrintMsg_Print_Params_IsValid(const PrintMsg_Print_Params& params) {
   return !params.content_size.IsEmpty() && !params.page_size.IsEmpty() &&
          !params.printable_area.IsEmpty() && params.document_cookie &&
-         params.desired_dpi && params.dpi && params.margin_top >= 0 &&
-         params.margin_left >= 0 && params.dpi > kMinDpi &&
-         params.document_cookie != 0;
+         params.desired_dpi && params.max_shrink && params.min_shrink &&
+         params.dpi && (params.margin_top >= 0) && (params.margin_left >= 0) &&
+         params.dpi > kMinDpi && params.document_cookie != 0;
 }
 
 PrintMsg_Print_Params GetCssPrintParams(
     blink::WebFrame* frame,
     int page_index,
     const PrintMsg_Print_Params& page_params) {
   PrintMsg_Print_Params page_css_params = page_params;
   int dpi = GetDPI(&page_params);
 
   blink::WebSize page_size_in_pixels(
@@ skipping 2121 matching lines @@
       blink::WebConsoleMessage::LevelWarning, message));
   return false;
 }
 
 void PrintWebViewHelper::ScriptingThrottler::Reset() {
   // Reset counter on successful print.
   count_ = 0;
 }
 
 }  // namespace printing