Print Preview: Go from event driven print preview back to print preview with sync messages. The s...

printing/print_job_constants.cc

 // Copyright (c) 2011 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";
 
 // Unique ID sent along every preview request.
 const char kPreviewRequestID[] = "requestID";
 
+// Unique ID to identify a print preview UI.
+const char kPreviewUIAddr[] = "previewUIAddr";
+
 // Print using cloud print: true if selected, false if not.
 const char kSettingCloudPrintId[] = "cloudPrintID";
 
 // Print job setting 'collate'.
 const char kSettingCollate[] = "collate";
 
 // Print out color: true for color, false for grayscale.
 const char kSettingColor[] = "color";
 
 // Number of copies.
@@ skipping 51 matching lines @@
 
 // The last page of a page range. (1-based)
 const char kSettingPageRangeTo[] = "to";
 
 // Printer name.
 const char kSettingPrinterName[] = "printerName";
 
 // Print to PDF option: true if selected, false if not.
 const char kSettingPrintToPDF[] = "printToPDF";
 
-// Indices used to represent first page, invalid page and complete
-// preview document.
+// Indices used to represent first preview page and complete preview document.
 const int FIRST_PAGE_INDEX = 0;
 const int COMPLETE_PREVIEW_DOCUMENT_INDEX = -1;
-const int INVALID_PAGE_INDEX = -2;
 
 }  // namespace printing