Update from https://crrev.com/318214

gpu/command_buffer/client/gles2_trace_implementation_autogen.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file is auto-generated from
 // gpu/command_buffer/build_gles2_cmd_buffer.py
 // It's formatted by clang-format using chromium coding style:
 //    clang-format -i -style=chromium filename
 // DO NOT EDIT!
 
@@ skipping 230 matching lines @@
                       char* infolog) override;
 void GetShaderPrecisionFormat(GLenum shadertype,
                               GLenum precisiontype,
                               GLint* range,
                               GLint* precision) override;
 void GetShaderSource(GLuint shader,
                      GLsizei bufsize,
                      GLsizei* length,
                      char* source) override;
 const GLubyte* GetString(GLenum name) override;
+void GetSynciv(GLsync sync,
+               GLenum pname,
+               GLsizei bufsize,
+               GLsizei* length,
+               GLint* values) override;
 void GetTexParameterfv(GLenum target, GLenum pname, GLfloat* params) override;
 void GetTexParameteriv(GLenum target, GLenum pname, GLint* params) override;
 void GetTransformFeedbackVarying(GLuint program,
                                  GLuint index,
                                  GLsizei bufsize,
                                  GLsizei* length,
                                  GLsizei* size,
                                  GLenum* type,
                                  char* name) override;
 GLuint GetUniformBlockIndex(GLuint program, const char* name) override;
@@ skipping 433 matching lines @@
                                   GLint bounds_height,
                                   GLfloat uv_x,
                                   GLfloat uv_y,
                                   GLfloat uv_width,
                                   GLfloat uv_height) override;
 void SwapInterval(GLint interval) override;
 void MatrixLoadfCHROMIUM(GLenum matrixMode, const GLfloat* m) override;
 void MatrixLoadIdentityCHROMIUM(GLenum matrixMode) override;
 void BlendBarrierKHR() override;
 #endif  // GPU_COMMAND_BUFFER_CLIENT_GLES2_TRACE_IMPLEMENTATION_AUTOGEN_H_