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/app/x11.go

Index: third_party/go/src/golang.org/x/mobile/app/x11.go
diff --git a/third_party/go/src/golang.org/x/mobile/app/x11.go b/third_party/go/src/golang.org/x/mobile/app/x11.go
deleted file mode 100644
index 19343208d0755819b97b0984b8b2b8ab96ee7087..0000000000000000000000000000000000000000
--- a/third_party/go/src/golang.org/x/mobile/app/x11.go
+++ /dev/null
@@ -1,90 +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 app
-
-/*
-Simple on-screen app debugging for X11. Not an officially supported
-development target for apps, as screens with mice are very different
-than screens with touch panels.
-
-On Ubuntu 14.04 'Trusty', you may have to install these libraries:
-sudo apt-get install libegl1-mesa-dev libgles2-mesa-dev libx11-dev
-*/
-
-/*
-#cgo LDFLAGS: -lEGL -lGLESv2 -lX11
-
-void runApp(void);
-*/
-import "C"
-import (
-	"runtime"
-	"sync"
-
-	"golang.org/x/mobile/event"
-	"golang.org/x/mobile/geom"
-)
-
-var cb Callbacks
-
-func run(callbacks Callbacks) {
-	runtime.LockOSThread()
-	cb = callbacks
-	C.runApp()
-}
-
-//export onResize
-func onResize(w, h int) {
-	// TODO(nigeltao): don't assume 72 DPI. DisplayWidth / DisplayWidthMM
-	// is probably the best place to start looking.
-	geom.PixelsPerPt = 1
-	geom.Width = geom.Pt(w)
-	geom.Height = geom.Pt(h)
-}
-
-var events struct {
-	sync.Mutex
-	pending []event.Touch
-}
-
-func sendTouch(ty event.TouchType, x, y float32) {
-	events.Lock()
-	events.pending = append(events.pending, event.Touch{
-		Type: ty,
-		Loc: geom.Point{
-			X: geom.Pt(x),
-			Y: geom.Pt(y),
-		},
-	})
-	events.Unlock()
-}
-
-//export onTouchStart
-func onTouchStart(x, y float32) { sendTouch(event.TouchStart, x, y) }
-
-//export onTouchMove
-func onTouchMove(x, y float32) { sendTouch(event.TouchMove, x, y) }
-
-//export onTouchEnd
-func onTouchEnd(x, y float32) { sendTouch(event.TouchEnd, x, y) }
-
-//export onDraw
-func onDraw() {
-	events.Lock()
-	pending := events.pending
-	events.pending = nil
-	events.Unlock()
-
-	for _, e := range pending {
-		if cb.Touch != nil {
-			cb.Touch(e)
-		}
-	}
-	if cb.Draw != nil {
-		cb.Draw()
-	}
-}