Enable NV_path_rendering in the Null GL.

include/gpu/gl/GrGLInterface.h

Index: include/gpu/gl/GrGLInterface.h
diff --git a/include/gpu/gl/GrGLInterface.h b/include/gpu/gl/GrGLInterface.h
index e17bb0bd84914fc8b61673de50bbd17435002244..47dfbaab20845960320ea3c852337ed8c30bf5fa 100644
--- a/include/gpu/gl/GrGLInterface.h
+++ b/include/gpu/gl/GrGLInterface.h
@@ -53,7 +53,7 @@ typedef intptr_t GrGLInterfaceCallbackData;
  * 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. */