Revert of Modifying TextBlobCacheTest to use SkRandomScalerContext

src/core/SkScalerContext.h

 /*
  * 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.
  */
 
 #ifndef SkScalerContext_DEFINED
 #define SkScalerContext_DEFINED
 
@@ skipping 283 matching lines @@
     /** Returns the unichar for the given glyph id.
      *  If there is no 1:1 mapping from the glyph id to a unichar, returns 0.
      *  The default implementation always returns 0, indicating failure.
      */
     virtual SkUnichar generateGlyphToChar(uint16_t glyphId);
 
     void forceGenerateImageFromPath() { fGenerateImageFromPath = true; }
     void forceOffGenerateImageFromPath() { fGenerateImageFromPath = false; }
 
 private:
-    friend class SkRandomScalerContext; // For debug purposes
-
     // never null
     SkAutoTUnref<SkTypeface> fTypeface;
 
     // optional object, which may be null
     SkPathEffect*   fPathEffect;
     SkMaskFilter*   fMaskFilter;
     SkRasterizer*   fRasterizer;
 
     // if this is set, we draw the image from a path, rather than
     // calling generateImage.
@@ skipping 46 matching lines @@
     return static_cast<SkPaint::Hinting>(hint);
 }
 
 void SkScalerContextRec::setHinting(SkPaint::Hinting hinting) {
     fFlags = (fFlags & ~SkScalerContext::kHinting_Mask) |
                                 (hinting << SkScalerContext::kHinting_Shift);
 }
 
 
 #endif