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/bind/printer.go

-// 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.
-
-package bind
-
-import (
-        "bytes"
-        "fmt"
-)
-
-type printer struct {
-        buf        *bytes.Buffer
-        indentEach []byte
-        indentText []byte
-        needIndent bool
-}
-
-func (p *printer) writeIndent() error {
-        if !p.needIndent {
-                return nil
-        }
-        p.needIndent = false
-        _, err := p.buf.Write(p.indentText)
-        return err
-}
-
-func (p *printer) Write(b []byte) (n int, err error) {
-        wrote := 0
-        for len(b) > 0 {
-                if err := p.writeIndent(); err != nil {
-                        return wrote, err
-                }
-                i := bytes.IndexByte(b, '\n')
-                if i < 0 {
-                        break
-                }
-                n, err = p.buf.Write(b[0 : i+1])
-                wrote += n
-                if err != nil {
-                        return wrote, err
-                }
-                b = b[i+1:]
-                p.needIndent = true
-        }
-        if len(b) > 0 {
-                n, err = p.buf.Write(b)
-                wrote += n
-        }
-        return wrote, err
-}
-
-func (p *printer) Printf(format string, args ...interface{}) {
-        if _, err := fmt.Fprintf(p, format, args...); err != nil {
-                panic(fmt.Sprintf("printer: %v", err))
-        }
-}
-
-func (p *printer) Indent() {
-        p.indentText = append(p.indentText, p.indentEach...)
-}
-
-func (p *printer) Outdent() {
-        if len(p.indentText) > len(p.indentEach)-1 {
-                p.indentText = p.indentText[len(p.indentEach):]
-        }
-}