Make SkTextBlob::RunIterator public.

src/gpu/GrTextBlobCache.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 GrTextBlobCache_DEFINED
 #define GrTextBlobCache_DEFINED
 
 #include "GrAtlasTextContext.h"
 #include "SkTDynamicHash.h"
-#include "SkTextBlob.h"
+#include "SkTextBlobPriv.h"
 
 class GrTextBlobCache {
 public:
     /**
      * The callback function used by the cache when it is still over budget after a purge. The
      * passed in 'data' is the same 'data' handed to setOverbudgetCallback.
      */
     typedef void (*PFOverBudgetCB)(void* data);
 
     GrTextBlobCache(PFOverBudgetCB cb, void* data)
@@ skipping 125 matching lines @@
     static const int kDefaultBudget = 1 << 22;
     BitmapBlobList fBlobList;
     SkTDynamicHash<GrAtlasTextBlob, GrAtlasTextBlob::Key> fCache;
     GrMemoryPool fPool;
     PFOverBudgetCB fCallback;
     void* fData;
     size_t fBudget;
 };
 
 #endif