Clarify kAutohinting is kForceAutohinting.

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 104 matching lines @@
 class SkScalerContext {
 public:
     typedef SkScalerContextRec Rec;
 
     enum Flags {
         kFrameAndFill_Flag        = 0x0001,
         kDevKernText_Flag         = 0x0002,
         kEmbeddedBitmapText_Flag  = 0x0004,
         kEmbolden_Flag            = 0x0008,
         kSubpixelPositioning_Flag = 0x0010,
-        kAutohinting_Flag         = 0x0020,
+        kForceAutohinting_Flag    = 0x0020,  // Use auto instead of bytcode hinting if hinting.
         kVertical_Flag            = 0x0040,
 
         // together, these two flags resulting in a two bit value which matches
         // up with the SkPaint::Hinting enum.
         kHinting_Shift            = 7, // to shift into the other flags above
         kHintingBit1_Flag         = 0x0080,
         kHintingBit2_Flag         = 0x0100,
 
         // Pixel geometry information.
         // only meaningful if fMaskFormat is LCD16 or LCD32
@@ skipping 201 matching lines @@
     return static_cast<SkPaint::Hinting>(hint);
 }
 
 void SkScalerContextRec::setHinting(SkPaint::Hinting hinting) {
     fFlags = (fFlags & ~SkScalerContext::kHinting_Mask) |
                                 (hinting << SkScalerContext::kHinting_Shift);
 }
 
 
 #endif