Wire glDiscardFramebuffer up to Skia.

ui/gl/gl_bindings_skia_in_process.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 
 #include "ui/gl/gl_bindings_skia_in_process.h"
 
 #include "base/logging.h"
 #include "third_party/skia/include/gpu/gl/GrGLInterface.h"
 #include "ui/gl/gl_bindings.h"
@@ skipping 169 matching lines @@
 }
 
 GLvoid StubGLDisable(GLenum cap) {
   glDisable(cap);
 }
 
 GLvoid StubGLDisableVertexAttribArray(GLuint index) {
   glDisableVertexAttribArray(index);
 }
 
+GLvoid StubGLDiscardFramebuffer(GLenum target, GLsizei numAttachments,
+                                const GLenum *attachments) {
+  glDiscardFramebufferEXT(target, numAttachments, attachments);
+}
+
 GLvoid StubGLDrawArrays(GLenum mode, GLint first, GLsizei count) {
   glDrawArrays(mode, first, count);
 }
 
 GLvoid StubGLDrawBuffer(GLenum mode) {
   glDrawBuffer(mode);
 }
 
 GLvoid StubGLDrawBuffers(GLsizei n, const GLenum* bufs) {
   glDrawBuffersARB(n, bufs);
@@ skipping 424 matching lines @@
   functions->fCullFace = StubGLCullFace;
   functions->fDeleteBuffers = StubGLDeleteBuffers;
   functions->fDeleteProgram = StubGLDeleteProgram;
   functions->fDeleteQueries = StubGLDeleteQueries;
   functions->fDeleteShader = StubGLDeleteShader;
   functions->fDeleteTextures = StubGLDeleteTextures;
   functions->fDeleteVertexArrays = StubGLDeleteVertexArrays;
   functions->fDepthMask = StubGLDepthMask;
   functions->fDisable = StubGLDisable;
   functions->fDisableVertexAttribArray = StubGLDisableVertexAttribArray;
+  functions->fDiscardFramebuffer = StubGLDiscardFramebuffer;
   functions->fDrawArrays = StubGLDrawArrays;
   functions->fDrawBuffer = StubGLDrawBuffer;
   functions->fDrawBuffers = StubGLDrawBuffers;
   functions->fDrawElements = StubGLDrawElements;
   functions->fEnable = StubGLEnable;
   functions->fEnableVertexAttribArray = StubGLEnableVertexAttribArray;
   functions->fEndQuery = StubGLEndQuery;
   functions->fFinish = StubGLFinish;
   functions->fFlush = StubGLFlush;
   functions->fFrontFace = StubGLFrontFace;
@@ skipping 81 matching lines @@
   functions->fBlitFramebuffer = StubGLBlitFramebuffer;
   functions->fMapBuffer = StubGLMapBuffer;
   functions->fUnmapBuffer = StubGLUnmapBuffer;
   functions->fBindFragDataLocationIndexed =
     StubGLBindFragDataLocationIndexed;
 
   return interface;
 }
 
 }  // namespace gfx