Convert PDF to PWG Raster using utility process.

chrome/common/chrome_utility_messages.h

Index: chrome/common/chrome_utility_messages.h
diff --git a/chrome/common/chrome_utility_messages.h b/chrome/common/chrome_utility_messages.h
index ec7a91436f158d4b7552ecc20f176aa3e1594ce4..1e63b12f46e0f0e78580f857d1c29bb993564df0 100644
--- a/chrome/common/chrome_utility_messages.h
+++ b/chrome/common/chrome_utility_messages.h
@@ -140,12 +140,19 @@ 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,
@@ -257,7 +264,7 @@ IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_UnpackWebResource_Failed,
 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 */)
@@ -266,7 +273,7 @@ IPC_MESSAGE_CONTROL1(ChromeUtilityHostMsg_ParseUpdateManifest_Failed,
 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.
@@ -274,9 +281,15 @@ 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