rename BitmapTextBlob and move it to its own file

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"
 
 class GrTextBlobCache {
 public:
-    typedef GrAtlasTextContext::BitmapTextBlob BitmapTextBlob;
-
     /**
      * 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)
         : fPool(kPreAllocSize, kMinGrowthSize)
         , fCallback(cb)
         , fData(data) {
         SkASSERT(cb && data);
     }
     ~GrTextBlobCache();
 
     // creates an uncached blob
-    BitmapTextBlob* createBlob(int glyphCount, int runCount, size_t maxVASize);
-    BitmapTextBlob* createBlob(const SkTextBlob* blob, size_t maxVAStride) {
+    GrAtlasTextBlob* createBlob(int glyphCount, int runCount, size_t maxVASize);
+    GrAtlasTextBlob* createBlob(const SkTextBlob* blob, size_t maxVAStride) {
         int glyphCount = 0;
         int runCount = 0;
         BlobGlyphCount(&glyphCount, &runCount, blob);
-        BitmapTextBlob* cacheBlob = this->createBlob(glyphCount, runCount, maxVAStride);
+        GrAtlasTextBlob* cacheBlob = this->createBlob(glyphCount, runCount, maxVAStride);
         return cacheBlob;
     }
 
-    BitmapTextBlob* createCachedBlob(const SkTextBlob* blob,
-                                     const BitmapTextBlob::Key& key,
+    GrAtlasTextBlob* createCachedBlob(const SkTextBlob* blob,
+                                     const GrAtlasTextBlob::Key& key,
                                      const SkMaskFilter::BlurRec& blurRec,
                                      const SkPaint& paint,
                                      size_t maxVAStride) {
         int glyphCount = 0;
         int runCount = 0;
         BlobGlyphCount(&glyphCount, &runCount, blob);
-        BitmapTextBlob* cacheBlob = this->createBlob(glyphCount, runCount, maxVAStride);
+        GrAtlasTextBlob* cacheBlob = this->createBlob(glyphCount, runCount, maxVAStride);
         cacheBlob->fKey = key;
         if (key.fHasBlur) {
             cacheBlob->fBlurRec = blurRec;
         }
         if (key.fStyle != SkPaint::kFill_Style) {
             cacheBlob->fStrokeInfo.fFrameWidth = paint.getStrokeWidth();
             cacheBlob->fStrokeInfo.fMiterLimit = paint.getStrokeMiter();
             cacheBlob->fStrokeInfo.fJoin = paint.getStrokeJoin();
         }
         this->add(cacheBlob);
         return cacheBlob;
     }
 
-    BitmapTextBlob* find(const BitmapTextBlob::Key& key) {
+    GrAtlasTextBlob* find(const GrAtlasTextBlob::Key& key) {
         return fCache.find(key);
     }
 
-    void remove(BitmapTextBlob* blob) {
+    void remove(GrAtlasTextBlob* blob) {
         fCache.remove(blob->fKey);
         fBlobList.remove(blob);
         blob->unref();
     }
 
-    void add(BitmapTextBlob* blob) {
+    void add(GrAtlasTextBlob* blob) {
         fCache.add(blob);
         fBlobList.addToHead(blob);
 
         // If we are overbudget, then unref until we are below budget again
         if (fPool.size() > kBudget) {
             BitmapBlobList::Iter iter;
             iter.init(fBlobList, BitmapBlobList::Iter::kTail_IterStart);
-            BitmapTextBlob* lruBlob = iter.get();
+            GrAtlasTextBlob* lruBlob = iter.get();
             SkASSERT(lruBlob);
             while (fPool.size() > kBudget && (lruBlob = iter.get()) && lruBlob != blob) {
                 fCache.remove(lruBlob->fKey);
 
                 // Backup the iterator before removing and unrefing the blob
                 iter.prev();
                 fBlobList.remove(lruBlob);
                 lruBlob->unref();
             }
 
             // If we break out of the loop with lruBlob == blob, then we haven't purged enough
             // use the call back and try to free some more.  If we are still overbudget after this,
             // then this single textblob is over our budget
             if (lruBlob == blob) {
                 (*fCallback)(fData);
             }
 
 #ifdef SK_DEBUG
             if (fPool.size() > kBudget) {
                 SkDebugf("Single textblob is larger than our whole budget");
             }
 #endif
         }
     }
 
-    void makeMRU(BitmapTextBlob* blob) {
+    void makeMRU(GrAtlasTextBlob* blob) {
         if (fBlobList.head() == blob) {
             return;
         }
 
         fBlobList.remove(blob);
         fBlobList.addToHead(blob);
     }
 
     void freeAll();
 
 private:
     // TODO move to SkTextBlob
     void BlobGlyphCount(int* glyphCount, int* runCount, const SkTextBlob* blob) {
         SkTextBlob::RunIterator itCounter(blob);
         for (; !itCounter.done(); itCounter.next(), (*runCount)++) {
             *glyphCount += itCounter.glyphCount();
         }
     }
 
-    typedef SkTInternalLList<BitmapTextBlob> BitmapBlobList;
+    typedef SkTInternalLList<GrAtlasTextBlob> BitmapBlobList;
 
     // Budget was chosen to be ~4 megabytes.  The min alloc and pre alloc sizes in the pool are
     // based off of the largest cached textblob I have seen in the skps(a couple of kilobytes).
     static const int kPreAllocSize = 1 << 17;
     static const int kMinGrowthSize = 1 << 17;
     static const int kBudget = 1 << 22;
     BitmapBlobList fBlobList;
-    SkTDynamicHash<BitmapTextBlob, BitmapTextBlob::Key> fCache;
+    SkTDynamicHash<GrAtlasTextBlob, GrAtlasTextBlob::Key> fCache;
     GrMemoryPool fPool;
     PFOverBudgetCB fCallback;
     void* fData;
 };
 
 #endif