Update from https://crrev.com/312600

gpu/command_buffer/client/gles2_interface_stub_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 102 matching lines @@
                        GLsizei width,
                        GLsizei height) override;
 GLuint CreateProgram() override;
 GLuint CreateShader(GLenum type) override;
 void CullFace(GLenum mode) override;
 void DeleteBuffers(GLsizei n, const GLuint* buffers) override;
 void DeleteFramebuffers(GLsizei n, const GLuint* framebuffers) override;
 void DeleteProgram(GLuint program) override;
 void DeleteRenderbuffers(GLsizei n, const GLuint* renderbuffers) override;
 void DeleteSamplers(GLsizei n, const GLuint* samplers) override;
+void DeleteSync(GLsync sync) override;
 void DeleteShader(GLuint shader) override;
 void DeleteTextures(GLsizei n, const GLuint* textures) override;
 void DeleteTransformFeedbacks(GLsizei n, const GLuint* ids) override;
 void DepthFunc(GLenum func) override;
 void DepthMask(GLboolean flag) override;
 void DepthRangef(GLclampf zNear, GLclampf zFar) override;
 void DetachShader(GLuint program, GLuint shader) override;
 void Disable(GLenum cap) override;
 void DisableVertexAttribArray(GLuint index) override;
 void DrawArrays(GLenum mode, GLint first, GLsizei count) override;
 void DrawElements(GLenum mode,
                   GLsizei count,
                   GLenum type,
                   const void* indices) override;
 void Enable(GLenum cap) override;
 void EnableVertexAttribArray(GLuint index) override;
+GLsync FenceSync(GLenum condition, GLbitfield flags) override;
 void Finish() override;
 void Flush() override;
 void FramebufferRenderbuffer(GLenum target,
                              GLenum attachment,
                              GLenum renderbuffertarget,
                              GLuint renderbuffer) override;
 void FramebufferTexture2D(GLenum target,
                           GLenum attachment,
                           GLenum textarget,
                           GLuint texture,
@@ skipping 93 matching lines @@
                               GLint y,
                               GLsizei width,
                               GLsizei height) override;
 GLboolean IsBuffer(GLuint buffer) override;
 GLboolean IsEnabled(GLenum cap) override;
 GLboolean IsFramebuffer(GLuint framebuffer) override;
 GLboolean IsProgram(GLuint program) override;
 GLboolean IsRenderbuffer(GLuint renderbuffer) override;
 GLboolean IsSampler(GLuint sampler) override;
 GLboolean IsShader(GLuint shader) override;
+GLboolean IsSync(GLsync sync) override;
 GLboolean IsTexture(GLuint texture) override;
 GLboolean IsTransformFeedback(GLuint transformfeedback) override;
 void LineWidth(GLfloat width) override;
 void LinkProgram(GLuint program) override;
 void PauseTransformFeedback() override;
 void PixelStorei(GLenum pname, GLint param) override;
 void PolygonOffset(GLfloat factor, GLfloat units) override;
 void ReadBuffer(GLenum src) override;
 void ReadPixels(GLint x,
                 GLint y,
@@ skipping 373 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_INTERFACE_STUB_AUTOGEN_H_