Update from https://crrev.com/312600

gpu/command_buffer/client/gles2_implementation_autogen.h

Index: gpu/command_buffer/client/gles2_implementation_autogen.h
diff --git a/gpu/command_buffer/client/gles2_implementation_autogen.h b/gpu/command_buffer/client/gles2_implementation_autogen.h
index 16753ae8d996bb77b80a7e44e117cfae30e87d16..0572358065c7d07e67ee2584523934968db922ca 100644
--- a/gpu/command_buffer/client/gles2_implementation_autogen.h
+++ b/gpu/command_buffer/client/gles2_implementation_autogen.h
@@ -163,6 +163,8 @@ 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;
@@ -188,6 +190,8 @@ void DrawElements(GLenum mode,
 
 void Enable(GLenum cap) override;
 
+GLsync FenceSync(GLenum condition, GLbitfield flags) override;
+
 void Finish() override;
 
 void Flush() override;
@@ -349,6 +353,8 @@ 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;