Print directly to CUPS using the IPP APIs

printing/metafile.h

Index: printing/metafile.h
diff --git a/printing/metafile.h b/printing/metafile.h
index e93ffd10f60fd7b1e2435903448484f49e09edf5..766e69360019cb051132cd630cf4bb81ca5ed0df 100644
--- a/printing/metafile.h
+++ b/printing/metafile.h
@@ -90,6 +90,10 @@ class PRINTING_EXPORT MetafilePlayer {
   // called after the metafile is closed. Returns true if writing succeeded.
   virtual bool SaveTo(base::File* file) const = 0;
 
+  // Populates the buffer with the underlying data. This function should ONLY be
+  // called after the metafile is closed. Returns true if writing succeeded.
+  virtual bool GetDataAsVector(std::vector<char>* buffer) const = 0;

[Lei Zhang, 2016/07/08 01:35:26]

Put this above SaveTo() since the impl below is already in that order?

[skau, 2016/07/09 00:28:33]

Done.

+
  private:
   DISALLOW_COPY_AND_ASSIGN(MetafilePlayer);
 };
@@ -155,7 +159,7 @@ class PRINTING_EXPORT Metafile : public MetafilePlayer {
                         const RECT* rect) const = 0;
 #endif  // OS_WIN
 
-  bool GetDataAsVector(std::vector<char>* buffer) const;
+  bool GetDataAsVector(std::vector<char>* buffer) const override;
 
   bool SaveTo(base::File* file) const override;