GPU process clients can perform a "shallow" finish.

gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h

Index: gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h
===================================================================
--- gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h	(revision 207109)
+++ gpu/command_buffer/client/gles2_interface_stub_impl_autogen.h	(working copy)
@@ -145,8 +145,6 @@
 }
 void GLES2InterfaceStub::Flush() {
 }
-void GLES2InterfaceStub::ShallowFlushCHROMIUM() {
-}
 void GLES2InterfaceStub::FramebufferRenderbuffer(
     GLenum /* target */, GLenum /* attachment */,
     GLenum /* renderbuffertarget */, GLuint /* renderbuffer */) {
@@ -313,6 +311,10 @@
     GLuint /* shader */, GLsizei /* count */, const GLchar* const* /* str */,
     const GLint* /* length */) {
 }
+void GLES2InterfaceStub::ShallowFinishCHROMIUM() {
+}
+void GLES2InterfaceStub::ShallowFlushCHROMIUM() {
+}
 void GLES2InterfaceStub::StencilFunc(
     GLenum /* func */, GLint /* ref */, GLuint /* mask */) {
 }