turn back on gpu tests

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 72 matching lines @@
     Name name() const SK_OVERRIDE;
 private:
     SkString                        fPath;
     SkLazyPtr<SkPicture, SafeUnref> fPic;
 };
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
 class GPUSink : public Sink {
 public:
-    GPUSink(GrContextFactory::GLContextType, GrGLStandard, int samples, bool dfText);
+    GPUSink(GrContextFactory::GLContextType, GrGLStandard, int samples, bool dfText, bool threaded);
 
     Error draw(const Src&, SkBitmap*, SkWStream*) const SK_OVERRIDE;
     int enclave() const SK_OVERRIDE;
     const char* fileExtension() const SK_OVERRIDE { return "png"; }
 private:
     GrContextFactory::GLContextType fContextType;
     GrGLStandard                    fGpuAPI;
     int                             fSampleCount;
     bool                            fUseDFText;
+    bool                            fThreaded;
 };
 
 class PDFSink : public Sink {
 public:
     PDFSink();
 
     Error draw(const Src&, SkBitmap*, SkWStream*) const SK_OVERRIDE;
     int enclave() const SK_OVERRIDE { return kPDFSink_Enclave; }
     const char* fileExtension() const SK_OVERRIDE { return "pdf"; }
 };
@@ skipping 55 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