Move flush id from WebGraphicsContext3DImpl to GLES2Implementation.

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 5ac7eba5d7bfbc83b78d86d475659b2a732619a7..eeeafb3ba444becd6c77fb12673e9692e6d39ffe 100644
--- a/gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h
+++ b/gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h
@@ -1037,6 +1037,9 @@ void GLES2InterfaceStub::ScheduleCALayerCHROMIUM(
 void GLES2InterfaceStub::CommitOverlayPlanesCHROMIUM() {}
 void GLES2InterfaceStub::SwapInterval(GLint /* interval */) {}
 void GLES2InterfaceStub::FlushDriverCachesCHROMIUM() {}
+GLuint GLES2InterfaceStub::GetLastFlushIdCHROMIUM() {
+  return 0;
+}
 void GLES2InterfaceStub::MatrixLoadfCHROMIUM(GLenum /* matrixMode */,
                                              const GLfloat* /* m */) {}
 void GLES2InterfaceStub::MatrixLoadIdentityCHROMIUM(GLenum /* matrixMode */) {}