Add glWaitSync to GPU command buffer.

gpu/command_buffer/client/gles2_trace_implementation_impl_autogen.h

Index: gpu/command_buffer/client/gles2_trace_implementation_impl_autogen.h
diff --git a/gpu/command_buffer/client/gles2_trace_implementation_impl_autogen.h b/gpu/command_buffer/client/gles2_trace_implementation_impl_autogen.h
index 7e7b1c551f0cc0d052cec29e1940a40517ea0709..8e6faa7a9c37b1a34940b993347a04b4f7cafb12 100644
--- a/gpu/command_buffer/client/gles2_trace_implementation_impl_autogen.h
+++ b/gpu/command_buffer/client/gles2_trace_implementation_impl_autogen.h
@@ -1474,6 +1474,13 @@ void GLES2TraceImplementation::Viewport(GLint x,
   gl_->Viewport(x, y, width, height);
 }
 
+void GLES2TraceImplementation::WaitSync(GLsync sync,
+                                        GLbitfield flags,
+                                        GLuint64 timeout) {
+  TRACE_EVENT_BINARY_EFFICIENT0("gpu", "GLES2Trace::WaitSync");
+  gl_->WaitSync(sync, flags, timeout);
+}
+
 void GLES2TraceImplementation::BlitFramebufferCHROMIUM(GLint srcX0,
                                                        GLint srcY0,
                                                        GLint srcX1,