Avoid printing draw target info to stderr while running unit tests

src/gpu/gl/GrGLCaps.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGLCaps_DEFINED
 #define GrGLCaps_DEFINED
@@ skipping 142 matching lines @@
      * then implicitly resolved when read.
      */
     bool usesImplicitMSAAResolve() const {
         return kES_IMG_MsToTexture_MSFBOType == fMSFBOType ||
                kES_EXT_MsToTexture_MSFBOType == fMSFBOType;
     }
 
     FBFetchType fbFetchType() const { return fFBFetchType; }
 
     /**
-     * Prints the caps info using GrPrintf.
+     * Returs a string containeng the caps info.
      */
-    virtual void print() const SK_OVERRIDE;
+    virtual SkString dump() const SK_OVERRIDE;
 
     /**
      * Gets an array of legal stencil formats. These formats are not guaranteed
      * to be supported by the driver but are legal GLenum names given the GL
      * version and extensions supported.
      */
     const SkTArray<StencilFormat, true>& stencilFormats() const {
         return fStencilFormats;
     }
 
@@ skipping 154 matching lines @@
     bool fUseNonVBOVertexAndIndexDynamicData : 1;
     bool fIsCoreProfile : 1;
     bool fFixedFunctionSupport : 1;
     bool fDiscardFBSupport : 1;
     bool fFullClearIsFree : 1;
 
     typedef GrDrawTargetCaps INHERITED;
 };
 
 #endif