Add support for GL_CHROMIUM_pixel_transfer_buffer_object.

gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h

Index: gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h
diff --git a/gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h b/gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h
index 735ac0aba6715aeb87a80177766a4340fea92e91..1cf75486d9005ba70cdef7cb6c1eb77e844fe49b 100644
--- a/gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h
+++ b/gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h
@@ -520,6 +520,13 @@ GLboolean GLES2InterfaceStub::EnableFeatureCHROMIUM(
     const char* /* feature */) {
   return 0;
 }
+void* GLES2InterfaceStub::MapBufferCHROMIUM(
+    GLuint /* target */, GLenum /* access */) {
+  return 0;
+}
+GLboolean GLES2InterfaceStub::UnmapBufferCHROMIUM(GLuint /* target */) {
+  return 0;
+}
 void* GLES2InterfaceStub::MapBufferSubDataCHROMIUM(
     GLuint /* target */, GLintptr /* offset */, GLsizeiptr /* size */,
     GLenum /* access */) {