Chromium implementation of discardBackbuffer WebGraphicsContext3D extension.

webkit/gpu/webgraphicscontext3d_in_process_impl.cc

Index: webkit/gpu/webgraphicscontext3d_in_process_impl.cc
diff --git a/webkit/gpu/webgraphicscontext3d_in_process_impl.cc b/webkit/gpu/webgraphicscontext3d_in_process_impl.cc
index 25b4559a29985c3ea673b9d3836bb8e956bc487f..3beb799cf8cc86a312a620d3e874e7639acde3bc 100644
--- a/webkit/gpu/webgraphicscontext3d_in_process_impl.cc
+++ b/webkit/gpu/webgraphicscontext3d_in_process_impl.cc
@@ -729,6 +729,12 @@ void WebGraphicsContext3DInProcessImpl::unmapTexSubImage2DCHROMIUM(
 void WebGraphicsContext3DInProcessImpl::setVisibilityCHROMIUM(bool visible) {
 }
 
+void WebGraphicsContext3DInProcessImpl::discardFramebufferEXT() {
+}
+
+void WebGraphicsContext3DInProcessImpl::ensureFramebufferCHROMIUM() {
+}
+
 void WebGraphicsContext3DInProcessImpl::copyTextureToParentTextureCHROMIUM(
     WebGLId id, WebGLId id2) {
   NOTIMPLEMENTED();