move SkTextBox into utils

src/utils/SkTextBox.cpp

 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkTextBox.h"
 #include "SkUtils.h"
 
@@ skipping 239 matching lines @@
 }
 
 int SkTextBox::countLines() const {
     return SkTextLineBreaker::CountLines(fText, fLen, *fPaint, fBox.width());
 }
 
 SkScalar SkTextBox::getTextHeight() const {
     SkScalar spacing = SkScalarMul(fPaint->getTextSize(), fSpacingMul) + fSpacingAdd;
     return this->countLines() * spacing;
 }