Convert PDF to PWG Raster using utility process.

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 122 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.
 IPC_MESSAGE_CONTROL4(ChromeUtilityMsg_RenderPDFPagesToMetafile,
                      base::PlatformFile,       // PDF file
                      base::FilePath,           // Location for output metafile
-                     printing::PdfRenderSettings,  // PDF render settitngs
+                     printing::PdfRenderSettings,  // PDF render settings
                      std::vector<printing::PageRange>)
 
+// Tell the utility process to render the given PDF into a PWGRaster.
+IPC_MESSAGE_CONTROL3(ChromeUtilityMsg_RenderPDFPagesToPWGRaster,
+                     IPC::PlatformFileForTransit,  /* Input PDF file */
+                     printing::PdfRenderSettings,  /* PDF render settings */
+                     IPC::PlatformFileForTransit   /* Output PWG file */)
+
 // Tell the utility process to decode the given JPEG image data with a robust
 // libjpeg codec.
 IPC_MESSAGE_CONTROL1(ChromeUtilityMsg_RobustJPEGDecodeImage,
                      std::vector<unsigned char>)  // encoded image contents
 
 // Tell the utility process to parse a JSON string into a Value object.
 IPC_MESSAGE_CONTROL1(ChromeUtilityMsg_ParseJSON,
                      std::string /* JSON to parse */)
 
 // Tells the utility process to get capabilities and defaults for the specified
@@ skipping 91 matching lines @@
 // web resource.  |error_message| is a user-readable explanation of what
 // went wrong.
 IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_UnpackWebResource_Failed,
                      std::string /* error_message, if any */)
 
 // Reply when the utility process has succeeded in parsing an update manifest
 // xml document.
 IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_ParseUpdateManifest_Succeeded,
                      UpdateManifest::Results /* updates */)
 
-// Reply when an error occured parsing the update manifest. |error_message|
+// Reply when an error occurred parsing the update manifest. |error_message|
 // is a description of what went wrong suitable for logging.
 IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_ParseUpdateManifest_Failed,
                      std::string /* error_message, if any */)
 
 // Reply when the utility process has succeeded in decoding the image.
 IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_DecodeImage_Succeeded,
                      SkBitmap)  // decoded image
 
-// Reply when an error occured decoding the image.
+// Reply when an error occurred decoding the image.
 IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_DecodeImage_Failed)
 
 // Reply when the utility process has succeeded in rendering the PDF.
 IPC_MESSAGE_CONTROL2(ChromeUtilityHostMsg_RenderPDFPagesToMetafile_Succeeded,
                      int,          // Highest rendered page number
                      double)       // Scale factor
 
-// Reply when an error occured rendering the PDF.
+// Reply when an error occurred rendering the PDF.
 IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_RenderPDFPagesToMetafile_Failed)
 
+// Reply when the utility process has succeeded in rendering the PDF to PWG.
+IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_RenderPDFPagesToPWGRaster_Succeeded)
+
+// Reply when an error occurred rendering the PDF to PWG.
+IPC_MESSAGE_CONTROL0(ChromeUtilityHostMsg_RenderPDFPagesToPWGRaster_Failed)
+
 // Reply when the utility process successfully parsed a JSON string.
 //
 // WARNING: The result can be of any Value subclass type, but we can't easily
 // pass indeterminate value types by const object reference with our IPC macros,
 // so we put the result Value into a ListValue. Handlers should examine the
 // first (and only) element of the ListValue for the actual result.
 IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_ParseJSON_Succeeded,
                      base::ListValue)
 
 // Reply when the utility process failed in parsing a JSON string.
@@ skipping 63 matching lines @@
 IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_IndexPicasaAlbumsContents_Finished,
                      picasa::AlbumImagesMap /* albums_images */)
 #endif  // defined(OS_WIN) || defined(OS_MACOSX)
 
 #if !defined(OS_ANDROID) && !defined(OS_IOS)
 // Reply after checking the passed media file. A true result indicates that
 // the file appears to be a well formed media file.
 IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_CheckMediaFile_Finished,
                      bool /* passed_checks */)
 #endif  // !defined(OS_ANDROID) && !defined(OS_IOS)