Avoid printing draw target info to stderr while running unit tests

src/gpu/GrDrawTargetCaps.h

Index: src/gpu/GrDrawTargetCaps.h
diff --git a/src/gpu/GrDrawTargetCaps.h b/src/gpu/GrDrawTargetCaps.h
index f6a6dc8a5963cc34c67c75d314475f88cb1f1147..e597e099c9430e7c56675801ef4b795ee5d846b8 100644
--- a/src/gpu/GrDrawTargetCaps.h
+++ b/src/gpu/GrDrawTargetCaps.h
@@ -5,13 +5,13 @@
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
-
-#include "SkRefCnt.h"
-#include "GrTypes.h"
-
 #ifndef GrDrawTargetCaps_DEFINED
 #define GrDrawTargetCaps_DEFINED
 
+#include "GrTypes.h"
+#include "SkRefCnt.h"
+#include "SkString.h"
+
 /**
  * Represents the draw target capabilities.
  */
@@ -24,7 +24,7 @@ public:
     GrDrawTargetCaps& operator= (const GrDrawTargetCaps&);
 
     virtual void reset();
-    virtual void print() const;
+    virtual SkString dump() const;
 
     bool eightBitPaletteSupport() const { return f8BitPaletteSupport; }
     bool npotTextureTileSupport() const { return fNPOTTextureTileSupport; }