[Print Preview]: Added code to support pdf fit to page functionality.

printing/print_job_constants.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 "printing/print_job_constants.h"
 
 namespace printing {
 
 // True if this is the first preview request.
 const char kIsFirstRequest[] = "isFirstRequest";
@@ skipping 24 matching lines @@
 
 // Number of copies.
 const char kSettingCopies[] = "copies";
 
 // Device name: Unique printer identifier.
 const char kSettingDeviceName[] = "deviceName";
 
 // Print job duplex mode.
 const char kSettingDuplexMode[] = "duplex";
 
+// Key that specifies the fit to page option value.
+const char kSettingFitToPageEnabled[] = "fitToPageEnabled";
+
 // True, when a new set of draft preview data is required.
 const char kSettingGenerateDraftData[] = "generateDraftData";
 
 // Option to print headers and Footers: true if selected, false if not.
 const char kSettingHeaderFooterEnabled[] = "headerFooterEnabled";
 
 // Default character spacing for text while printing headers and footers.
 // (For CoreGraphics only).
 const int kSettingHeaderFooterCharacterSpacing = 0;
 
@@ skipping 90 matching lines @@
 const char kGreyscale[] = "Greyscale";
 const char kMonochrome[] = "Monochrome";
 const char kNormal[] = "Normal";
 const char kNormalGray[] = "Normal.Gray";
 const char kRGB[] = "RGB";
 const char kRGBA[] = "RGBA";
 const char kRGB16[] = "RGB16";
 #endif
 
 }  // namespace printing