Plumbed in discard_framebuffer extension

src/gpu/gl/GrGLNoOpInterface.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLNoOpInterface.h"
 #include "SkString.h"
 #include "SkThread.h"
@@ skipping 220 matching lines @@
                                                   const GrGLint* params) {
 }
 
 GrGLvoid GR_GL_FUNCTION_TYPE noOpGLTexStorage2D(GrGLenum target,
                                                 GrGLsizei levels,
                                                 GrGLenum internalformat,
                                                 GrGLsizei width,
                                                 GrGLsizei height) {
 }
 
+GrGLvoid GR_GL_FUNCTION_TYPE noOpGLDiscardFramebuffer(GrGLenum target, 
+                                                      GrGLsizei numAttachments, 
+                                                      const GrGLenum* attachments) {
+}
+
 GrGLvoid GR_GL_FUNCTION_TYPE noOpGLTexSubImage2D(GrGLenum target,
                                                  GrGLint level,
                                                  GrGLint xoffset,
                                                  GrGLint yoffset,
                                                  GrGLsizei width,
                                                  GrGLsizei height,
                                                  GrGLenum format,
                                                  GrGLenum type,
                                                  const GrGLvoid* pixels) {
 }
@@ skipping 363 matching lines @@
                                                           GrGLint* params) {
     // we used to use this to query stuff about externally created textures,
     // now we just require clients to tell us everything about the texture.
     GrCrash("Should never query texture parameters.");
 }
 
 GrGLint GR_GL_FUNCTION_TYPE noOpGLGetUniformLocation(GrGLuint program, const char* name) {
     static int gUniLocation = 0;
     return ++gUniLocation;
 }