Printing on Windows via PDF

chrome/common/chrome_utility_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.
 
 // Multiply-included message file, so no include guard.
 
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
@@ skipping 160 matching lines @@
 // Tell the utility process to decode the given image data.
 IPC_MESSAGE_CONTROL1(ChromeUtilityMsg_DecodeImage,
                      std::vector<unsigned char>)  // encoded image contents
 
 // Tell the utility process to decode the given image data, which is base64
 // encoded.
 IPC_MESSAGE_CONTROL1(ChromeUtilityMsg_DecodeImageBase64,
                      std::string)  // base64 encoded image contents
 
 // Tell the utility process to render the given PDF into a metafile.
-// TODO(vitalybuka): switch to IPC::PlatformFileForTransit.
+// TODO(vitalybuka|scottmg): Deprecated, use RenderPDFPagesToMetafileHandles.
 IPC_MESSAGE_CONTROL4(ChromeUtilityMsg_RenderPDFPagesToMetafile,
                      base::PlatformFile,       // PDF file
                      base::FilePath,           // Location for output metafile
                      printing::PdfRenderSettings,  // PDF render settings
                      std::vector<printing::PageRange>)
 
+IPC_MESSAGE_CONTROL4(ChromeUtilityMsg_RenderPDFPagesToMetafileHandles,
+                     IPC::PlatformFileForTransit,  // PDF file
+                     IPC::PlatformFileForTransit,  // Output EMF.
+                     printing::PdfRenderSettings,  // PDF render settings
+                     std::vector<printing::PageRange>)
+
 // Tell the utility process to render the given PDF into a PWGRaster.
 IPC_MESSAGE_CONTROL4(ChromeUtilityMsg_RenderPDFPagesToPWGRaster,
                      IPC::PlatformFileForTransit, /* Input PDF file */
                      printing::PdfRenderSettings, /* PDF render settings */
                      // PWG transform settings.
                      printing::PwgRasterSettings,
                      IPC::PlatformFileForTransit /* Output PWG file */)
 
 // Tell the utility process to decode the given JPEG image data with a robust
 // libjpeg codec.
@@ skipping 313 matching lines @@
 IPC_MESSAGE_CONTROL2(ChromeUtilityHostMsg_GetAndEncryptWiFiCredentials,
                      std::string /* ssid */,
                      std::vector<uint8> /* public_key */)
 
 // Reply after getting WiFi credentials from the system and encrypting them with
 // caller's public key. |success| is false if error occurred.
 IPC_MESSAGE_CONTROL2(ChromeUtilityHostMsg_GotEncryptedWiFiCredentials,
                      std::vector<uint8> /* encrypted_key_data */,
                      bool /* success */)
 #endif  // defined(OS_WIN)