Enable NV_path_rendering in the Null GL.

include/gpu/gl/GrGLInterface.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLInterface_DEFINED
 #define GrGLInterface_DEFINED
 
@@ skipping 35 matching lines @@
 #if GR_GL_PER_GL_FUNC_CALLBACK
 typedef void (*GrGLInterfaceCallbackProc)(const GrGLInterface*);
 typedef intptr_t GrGLInterfaceCallbackData;
 #endif
 
 /**
  * Creates a null GrGLInterface that doesn't draw anything. Used for measuring
  * CPU overhead. TODO: We would like to move this to tools/gpu/gl/null but currently
  * Chromium is using it in its unit tests.
  */
-const SK_API GrGLInterface* GrGLCreateNullInterface();
+const SK_API GrGLInterface* GrGLCreateNullInterface(bool enableNVPR = false);
 
 /** Function that returns a new interface identical to "interface" but without support for
     GL_NV_path_rendering. */
 const GrGLInterface* GrGLInterfaceRemoveNVPR(const GrGLInterface*);
 
 /** Function that returns a new interface identical to "interface" but with support for
     test version of GL_EXT_debug_marker. */
 const GrGLInterface* GrGLInterfaceAddTestDebugMarker(const GrGLInterface*,
                                                      GrGLInsertEventMarkerProc insertEventMarkerFn,
                                                      GrGLPushGroupMarkerProc pushGroupMarkerFn,
@@ skipping 398 matching lines @@
         /* EGL functions */
         GrGLFunction<GrEGLCreateImageProc> fEGLCreateImage;
         GrGLFunction<GrEGLDestroyImageProc> fEGLDestroyImage;
     } fFunctions;
 
     // This exists for internal testing.
     virtual void abandon() const {}
 };
 
 #endif