Print Preview: Hook up the print button to initiate printing without displaying a print dialog.

printing/printing_context_cairo.h

 // 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.
 
 #ifndef PRINTING_PRINTING_CONTEXT_CAIRO_H_
 #define PRINTING_PRINTING_CONTEXT_CAIRO_H_
 
 #include <string>
 
 #include "printing/printing_context.h"
@@ skipping 22 matching lines @@
   // Prints the document contained in |metafile|.
   void PrintDocument(const NativeMetafile* metafile);
 #endif
 
   // PrintingContext implementation.
   virtual void AskUserForSettings(gfx::NativeView parent_view,
                                   int max_pages,
                                   bool has_selection,
                                   PrintSettingsCallback* callback);
   virtual Result UseDefaultSettings();
+  virtual Result UpdatePrintSettings(const PageRanges& ranges);

[Lei Zhang, 2011/03/03 00:22:44]

nit: This comes after InitWithSettings(), per printing_context.h. Same for the
other platforms' printing context headers.

[kmadhusu, 2011/03/04 19:39:02]

Moved it before InitPrintSettings in printing_context.h

   virtual Result InitWithSettings(const PrintSettings& settings);
   virtual Result NewDocument(const string16& document_name);
   virtual Result NewPage();
   virtual Result PageDone();
   virtual Result DocumentDone();
   virtual void Cancel();
   virtual void ReleaseContext();
   virtual gfx::NativeDrawingContext context() const;
 
  private:
 #if !defined(OS_CHROMEOS)
   string16 document_name_;
   void* print_dialog_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(PrintingContextCairo);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_CAIRO_H_