Add support for all compressed formats in KTX file format

src/utils/SkTextureCompressor.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkTextureCompressor_DEFINED
 #define SkTextureCompressor_DEFINED
 
 #include "SkImageInfo.h"
-#include "SkBlitter.h"
 
 class SkBitmap;
+class SkBlitter;
 class SkData;
 
 namespace SkTextureCompressor {
     // Various texture compression formats that we support.
     enum Format {
         // Alpha only formats.
         kLATC_Format,       // 4x4 blocks, (de)compresses A8
         kR11_EAC_Format,    // 4x4 blocks, (de)compresses A8
 
         // RGB only formats
@@ skipping 57 matching lines @@
     // Returns the desired dimensions of the block size for the given format. These dimensions
     // don't necessarily correspond to the specification's dimensions, since there may
     // be specialized algorithms that operate on multiple blocks at once. If the
     // flag 'matchSpec' is true, then the actual dimensions from the specification are
     // returned. If the flag is false, then these dimensions reflect the appropriate operable
     // dimensions of the compression functions.
     void GetBlockDimensions(Format format, int* dimX, int* dimY, bool matchSpec = false);
 }
 
 #endif