Add Postscript Printing

chrome/common/chrome_utility_printing_messages.h

Index: chrome/common/chrome_utility_printing_messages.h
diff --git a/chrome/common/chrome_utility_printing_messages.h b/chrome/common/chrome_utility_printing_messages.h
index bce3da90cc5297a2d1fe5dfa8bb4e8324b5016a5..847b2410c18fa2123a430391293a2d15be87797f 100644
--- a/chrome/common/chrome_utility_printing_messages.h
+++ b/chrome/common/chrome_utility_printing_messages.h
@@ -32,6 +32,7 @@ IPC_ENUM_TRAITS_MAX_VALUE(printing::PdfRenderSettings::Mode,
 
 IPC_STRUCT_TRAITS_BEGIN(printing::PdfRenderSettings)
   IPC_STRUCT_TRAITS_MEMBER(area)
+  IPC_STRUCT_TRAITS_MEMBER(offsets)
   IPC_STRUCT_TRAITS_MEMBER(dpi)
   IPC_STRUCT_TRAITS_MEMBER(autorotate)
   IPC_STRUCT_TRAITS_MEMBER(mode)
@@ -120,7 +121,22 @@ IPC_MESSAGE_CONTROL2(ChromeUtilityMsg_RenderPDFPagesToMetafiles_GetPage,
 
 // Requests utility process to stop conversion and exit.
 IPC_MESSAGE_CONTROL0(ChromeUtilityMsg_RenderPDFPagesToMetafiles_Stop)
-#endif  // ENABLE_PRINTING && OS_WIN
+
+// Tell the utility process to start rendering the given PDF into PS.
+// Utility process would be alive until
+// ChromeUtilityMsg_RenderPDFPagesToPostScript_Stop message.
+IPC_MESSAGE_CONTROL2(ChromeUtilityMsg_RenderPDFPagesToPostScript_Start,
+                     IPC::PlatformFileForTransit /* input_file */,
+                     printing::PdfRenderSettings /* settings */)
+
+// Requests conversion of the next page.
+IPC_MESSAGE_CONTROL2(ChromeUtilityMsg_RenderPDFPagesToPostScript_GetPage,
+                     int /* page_number */,
+                     IPC::PlatformFileForTransit /* output_file */)
+
+// Requests utility process to stop conversion and exit.
+IPC_MESSAGE_CONTROL0(ChromeUtilityMsg_RenderPDFPagesToPostScript_Stop)
+#endif  //  BUILDFLAG(ENABLE_PRINTING) && defined(OS_WIN)
 
 //------------------------------------------------------------------------------
 // Utility process host messages:
@@ -169,6 +185,15 @@ IPC_MESSAGE_CONTROL2(ChromeUtilityHostMsg_RenderPDFPagesToMetafiles_PageDone,
                      bool /* success */,
                      float /* scale_factor */)
 
+// Reply when the utility process loaded PDF. |page_count| is 0, if loading
+// failed.
+IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_RenderPDFPagesToPostScript_PageCount,
+                     int /* page_count */)
+
+// Reply when the utility process rendered the PDF page.
+IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_RenderPDFPagesToPostScript_PageDone,
+                     bool /* success */)
+
 // Request that the given font characters be loaded by the browser so it's
 // cached by the OS. Please see
 // PdfToEmfUtilityProcessHostClient::OnPreCacheFontCharacters for details.