Remove third_party/golang.org/x/mobile as it is no longer used with Go 1.5.

third_party/go/src/golang.org/x/mobile/gl/glutil/context_x11.go

Index: third_party/go/src/golang.org/x/mobile/gl/glutil/context_x11.go
diff --git a/third_party/go/src/golang.org/x/mobile/gl/glutil/context_x11.go b/third_party/go/src/golang.org/x/mobile/gl/glutil/context_x11.go
deleted file mode 100644
index 01c44f5f5730357cd207bee9998864de8bb74ccb..0000000000000000000000000000000000000000
--- a/third_party/go/src/golang.org/x/mobile/gl/glutil/context_x11.go
+++ /dev/null
@@ -1,105 +0,0 @@
-// Copyright 2014 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// +build linux,!android
-
-package glutil
-
-/*
-#cgo LDFLAGS: -lEGL
-#include <EGL/egl.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-void createContext(EGLDisplay *out_dpy, EGLContext *out_ctx, EGLSurface *out_surf) {
-	EGLDisplay e_dpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);
-	if (!e_dpy) {
-		fprintf(stderr, "eglGetDisplay failed\n");
-		exit(1);
-	}
-	EGLint e_major, e_minor;
-	if (!eglInitialize(e_dpy, &e_major, &e_minor)) {
-		fprintf(stderr, "eglInitialize failed\n");
-		exit(1);
-	}
-	eglBindAPI(EGL_OPENGL_ES_API);
-	static const EGLint config_attribs[] = {
-		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
-		EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
-		EGL_BLUE_SIZE, 8,
-		EGL_GREEN_SIZE, 8,
-		EGL_RED_SIZE, 8,
-		EGL_CONFIG_CAVEAT, EGL_NONE,
-		EGL_NONE
-	};
-	EGLConfig config;
-	EGLint num_configs;
-	if (!eglChooseConfig(e_dpy, config_attribs, &config, 1, &num_configs)) {
-		fprintf(stderr, "eglChooseConfig failed\n");
-		exit(1);
-	}
-	static const EGLint ctx_attribs[] = {
-		EGL_CONTEXT_CLIENT_VERSION, 2,
-		EGL_NONE
-	};
-	EGLContext e_ctx = eglCreateContext(e_dpy, config, EGL_NO_CONTEXT, ctx_attribs);
-	if (e_ctx == EGL_NO_CONTEXT) {
-		fprintf(stderr, "eglCreateContext failed\n");
-		exit(1);
-	}
-	static const EGLint pbuf_attribs[] = {
-		EGL_NONE
-	};
-	EGLSurface e_surf = eglCreatePbufferSurface(e_dpy, config, pbuf_attribs);
-	if (e_surf == EGL_NO_SURFACE) {
-		fprintf(stderr, "eglCreatePbufferSurface failed\n");
-		exit(1);
-	}
-	if (!eglMakeCurrent(e_dpy, e_surf, e_surf, e_ctx)) {
-		fprintf(stderr, "eglMakeCurrent failed\n");
-		exit(1);
-	}
-	*out_surf = e_surf;
-	*out_ctx = e_ctx;
-	*out_dpy = e_dpy;
-}
-
-void destroyContext(EGLDisplay e_dpy, EGLContext e_ctx, EGLSurface e_surf) {
-	if (!eglMakeCurrent(e_dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT)) {
-		fprintf(stderr, "eglMakeCurrent failed\n");
-		exit(1);
-	}
-	if (!eglDestroySurface(e_dpy, e_surf)) {
-		fprintf(stderr, "eglDestroySurface failed\n");
-		exit(1);
-	}
-	if (!eglDestroyContext(e_dpy, e_ctx)) {
-		fprintf(stderr, "eglDestroyContext failed\n");
-		exit(1);
-	}
-}
-*/
-import "C"
-
-import (
-	"runtime"
-)
-
-type contextGL struct {
-	dpy  C.EGLDisplay
-	ctx  C.EGLContext
-	surf C.EGLSurface
-}
-
-func createContext() *contextGL {
-	runtime.LockOSThread()
-	c := &contextGL{}
-	C.createContext(&c.dpy, &c.ctx, &c.surf)
-	return c
-}
-
-func (c *contextGL) destroy() {
-	C.destroyContext(c.dpy, c.ctx, c.surf)
-	runtime.UnlockOSThread()
-}