Merge 153342 - Print preview: Use an ID instead of memory pointer string in WebUI.

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>
 
@@ skipping 21 matching lines @@
   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;
+  int32 preview_ui_id;
   int preview_request_id;
   bool is_first_request;
   WebKit::WebPrintScalingOption print_scaling_option;
   bool print_to_pdf;
   bool display_header_footer;
   string16 date;
   string16 title;
   string16 url;
 };
 
@@ skipping 50 matching lines @@
 
   // Should only print currently selected text.
   IPC_STRUCT_TRAITS_MEMBER(selection_only)
 
   // Does the printer support alpha blending?
   IPC_STRUCT_TRAITS_MEMBER(supports_alpha_blend)
 
   // *** Parameters below are used only for print preview. ***
 
   // The print preview ui associated with this request.
-  IPC_STRUCT_TRAITS_MEMBER(preview_ui_addr)
+  IPC_STRUCT_TRAITS_MEMBER(preview_ui_id)
 
   // 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)
 
@@ skipping 255 matching lines @@
                     printing::PageSizeMargins /* page layout in points */,
                     gfx::Rect /* printable area in points */,
                     bool /* has custom page size style */)
 
 // Notify the browser a print preview page has been rendered.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_DidPreviewPage,
                     PrintHostMsg_DidPreviewPage_Params /* params */)
 
 // Asks the browser whether the print preview has been cancelled.
 IPC_SYNC_MESSAGE_ROUTED2_1(PrintHostMsg_CheckForCancel,
-                           std::string /* print preview ui address */,
+                           int32 /* PrintPreviewUI ID */,
                            int /* request id */,
                            bool /* print preview cancelled */)
 
 // Sends back to the browser the complete rendered document (non-draft mode,
 // used for printing) that was requested by a PrintMsg_PrintPreview message.
 // The memory handle in this message is already valid in the browser process.
 IPC_MESSAGE_ROUTED1(PrintHostMsg_MetafileReadyForPrinting,
                     PrintHostMsg_DidPreviewDocument_Params /* params */)
 
 // Tell the browser printing failed.
@@ skipping 15 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)