PrintPreview: Fix printer color settings issues based on printer ppd/schema information.

printing/print_job_constants.cc

Index: printing/print_job_constants.cc
diff --git a/printing/print_job_constants.cc b/printing/print_job_constants.cc
index 3efb488044e9a9b1334085f88401a059ab2aa7ba..5420e7401026bd3ebdf6215944d401312277a951 100644
--- a/printing/print_job_constants.cc
+++ b/printing/print_job_constants.cc
@@ -121,4 +121,22 @@ const char kSettingPrintToPDF[] = "printToPDF";
 const int FIRST_PAGE_INDEX = 0;
 const int COMPLETE_PREVIEW_DOCUMENT_INDEX = -1;
 
+#if defined (USE_CUPS)
+const char kBlack[] = "Black";
+const char kCMYK[] = "CMYK";
+const char kKCMY[] = "KCMY";
+const char kCMY_K[] = "CMY+K";
+const char kCMY[] = "CMY";
+const char kColor[] = "Color";
+const char kGray[] = "Gray";
+const char kGrayscale[] = "Grayscale";
+const char kGreyscale[] = "Greyscale";
+const char kMonochrome[] = "Monochrome";
+const char kNormal[] = "Normal";
+const char kNormalGray[] = "Normal.Gray";
+const char kRGB[] = "RGB";
+const char kRGBA[] = "RGBA";
+const char kRGB16[] = "RGB16";
+#endif
+
 }  // namespace printing