Don't test pipe modes nobody uses.

dm/DMSrcSink.h

 #ifndef DMSrcSink_DEFINED
 #define DMSrcSink_DEFINED
 
 #include "DMGpuSupport.h"
 #include "SkBBHFactory.h"
 #include "SkBBoxHierarchy.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
 #include "SkData.h"
 #include "SkGPipe.h"
@@ skipping 115 matching lines @@
     Error draw(const Src&, SkBitmap*, SkWStream*) const SK_OVERRIDE;
     int enclave() const SK_OVERRIDE { return fSink->enclave(); }
     const char* fileExtension() const SK_OVERRIDE { return fSink->fileExtension(); }
 private:
     SkMatrix            fMatrix;
     SkAutoTDelete<Sink> fSink;
 };
 
 class ViaPipe : public Sink {
 public:
-    ViaPipe(int flags, Sink*);
+    explicit ViaPipe(Sink*);
 
     Error draw(const Src&, SkBitmap*, SkWStream*) const SK_OVERRIDE;
     int enclave() const SK_OVERRIDE { return fSink->enclave(); }
     const char* fileExtension() const SK_OVERRIDE { return fSink->fileExtension(); }
 private:
-    SkGPipeWriter::Flags fFlags;
     SkAutoTDelete<Sink>  fSink;
 };
 
 class ViaSerialization : public Sink {
 public:
     explicit ViaSerialization(Sink*);
 
     Error draw(const Src&, SkBitmap*, SkWStream*) const SK_OVERRIDE;
     int enclave() const SK_OVERRIDE { return fSink->enclave(); }
     const char* fileExtension() const SK_OVERRIDE { return fSink->fileExtension(); }
@@ skipping 10 matching lines @@
     const char* fileExtension() const SK_OVERRIDE { return fSink->fileExtension(); }
 private:
     const int                   fW, fH;
     SkAutoTDelete<SkBBHFactory> fFactory;
     SkAutoTDelete<Sink>         fSink;
 };
 
 }  // namespace DM
 
 #endif//DMSrcSink_DEFINED