Move DistanceAdjustTable to its own file

src/gpu/GrAtlasTextContext.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrAtlasTextContext_DEFINED
 #define GrAtlasTextContext_DEFINED
 
 #include "GrTextContext.h"
 
 #include "GrAtlasTextBlob.h"
+#include "GrDistanceFieldAdjustTable.h"
 #include "GrGeometryProcessor.h"
 #include "SkTextBlobRunIterator.h"
 
 #ifdef GR_TEST_UTILS
 #include "GrBatchTest.h"
 #endif
 
 class GrDrawBatch;
 class GrDrawContext;
 class GrDrawTarget;
@@ skipping 117 matching lines @@
                                                const char text[], size_t byteLength,
                                                SkScalar x, SkScalar y,
                                                const SkIRect& regionClipBounds);
     inline GrAtlasTextBlob* createDrawPosTextBlob(const GrClip&, const GrPaint&,
                                                   const SkPaint&, const SkMatrix& viewMatrix,
                                                   const char text[], size_t byteLength,
                                                   const SkScalar pos[], int scalarsPerPosition,
                                                   const SkPoint& offset,
                                                   const SkIRect& regionClipBounds);
 
-    // Distance field text needs this table to compute a value for use in the fragment shader.
-    // Because the GrAtlasTextContext can go out of scope before the final flush, this needs to be
-    // refcnted and malloced
-    struct DistanceAdjustTable : public SkNVRefCnt<DistanceAdjustTable> {
-        DistanceAdjustTable() { this->buildDistanceAdjustTable(); }
-        ~DistanceAdjustTable() { delete[] fTable; }
-
-        const SkScalar& operator[] (int i) const {
-            return fTable[i];
-        }
-
-    private:
-        void buildDistanceAdjustTable();
-
-        SkScalar* fTable;
-    };
-
     GrBatchTextStrike* fCurrStrike;
     GrTextBlobCache* fCache;
-    SkAutoTUnref<const DistanceAdjustTable> fDistanceAdjustTable;
-
-    friend class GrTextBlobCache;
-    friend class GrAtlasTextBatch;
+    SkAutoTUnref<const GrDistanceFieldAdjustTable> fDistanceAdjustTable;
 
 #ifdef GR_TEST_UTILS
     DRAW_BATCH_TEST_FRIEND(TextBlobBatch);
 #endif
 
     typedef GrTextContext INHERITED;
 };
 
 #endif