Chromium implementation of discardBackbuffer WebGraphicsContext3D extension.

content/common/gpu/client/content_gl_context.cc

Index: content/common/gpu/client/content_gl_context.cc
diff --git a/content/common/gpu/client/content_gl_context.cc b/content/common/gpu/client/content_gl_context.cc
index 9e090768b369358a98a7befb3e9de6acede86077..3ee10af4232b142f35338a0e698e4c89e1030045 100644
--- a/content/common/gpu/client/content_gl_context.cc
+++ b/content/common/gpu/client/content_gl_context.cc
@@ -279,6 +279,14 @@ bool ContentGLContext::SetSurfaceVisible(bool visible) {
   return GetCommandBufferProxy()->SetSurfaceVisible(visible);
 }
 
+bool ContentGLContext::DiscardBackbuffer() {
+  return GetCommandBufferProxy()->DiscardBackbuffer();
+}
+
+bool ContentGLContext::EnsureBackbuffer() {
+  return GetCommandBufferProxy()->EnsureBackbuffer();
+}
+
 void ContentGLContext::SetMemoryAllocationChangedCallback(
     const base::Callback<void(const GpuMemoryAllocationForRenderer&)>&
         callback) {