[Print Preview] Modified PrepareFrameAndViewPrint class to call the new printBegin function to supp…

chrome/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 <string>
 #include <vector>
 
 #include "base/values.h"
 #include "base/shared_memory.h"
 #include "ipc/ipc_message_macros.h"
 #include "printing/page_size_margins.h"
 #include "printing/print_job_constants.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebPrintScalingOption.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/rect.h"
 
 #ifndef CHROME_COMMON_PRINT_MESSAGES_H_
 #define CHROME_COMMON_PRINT_MESSAGES_H_
 
 struct PrintMsg_Print_Params {
   PrintMsg_Print_Params();
   ~PrintMsg_Print_Params();
 
   // 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;
   std::string preview_ui_addr;
   int preview_request_id;
   bool is_first_request;
-  bool fit_to_paper_size;
+  WebKit::WebPrintScalingOption print_scaling_option;
   bool print_to_pdf;
   bool display_header_footer;
   string16 date;
   string16 title;
   string16 url;
 };
 
 struct PrintMsg_PrintPages_Params {
   PrintMsg_PrintPages_Params();
   ~PrintMsg_PrintPages_Params();
 
   // Resets the members of the struct to 0.
   void Reset();
 
   PrintMsg_Print_Params params;
   std::vector<int> pages;
 };
 
 #endif  // CHROME_COMMON_PRINT_MESSAGES_H_
 
 #define IPC_MESSAGE_START PrintMsgStart
 
 IPC_ENUM_TRAITS(printing::MarginType)
+IPC_ENUM_TRAITS(WebKit::WebPrintScalingOption)
 
 // Parameters for a render request.
 IPC_STRUCT_TRAITS_BEGIN(PrintMsg_Print_Params)
   // Physical size of the page, including non-printable margins,
   // in pixels according to dpi.
   IPC_STRUCT_TRAITS_MEMBER(page_size)
 
   // In pixels according to dpi_x and dpi_y.
   IPC_STRUCT_TRAITS_MEMBER(content_size)
 
@@ skipping 31 matching lines @@
 
   // The print preview ui associated with this request.
   IPC_STRUCT_TRAITS_MEMBER(preview_ui_addr)
 
   // The id of the preview request.
   IPC_STRUCT_TRAITS_MEMBER(preview_request_id)
 
   // True if this is the first preview request.
   IPC_STRUCT_TRAITS_MEMBER(is_first_request)
 
+  // Specifies the page scaling option for preview printing.
+  IPC_STRUCT_TRAITS_MEMBER(print_scaling_option)
+
   // True if print to pdf is requested.
   IPC_STRUCT_TRAITS_MEMBER(print_to_pdf)
 
   // Specifies if the header and footer should be rendered.
   IPC_STRUCT_TRAITS_MEMBER(display_header_footer)
 
   // Date string to be printed as header if requested by the user.
   IPC_STRUCT_TRAITS_MEMBER(date)
 
   // Title string to be printed as header if requested by the user.
@@ skipping 284 matching lines @@
                     int /* document cookie */)
 
 // Run a nested message loop in the renderer until print preview for
 // window.print() finishes.
 IPC_SYNC_MESSAGE_ROUTED1_0(PrintHostMsg_ScriptedPrintPreview,
                            bool /* is_modifiable */)
 
 // Notify the browser that the PDF in the initiator renderer has disabled print
 // scaling option.
 IPC_MESSAGE_ROUTED0(PrintHostMsg_PrintPreviewScalingDisabled)