Avoid regenerating cached textblobs on integer scrolls

src/gpu/GrTextBlobCache.h

Index: src/gpu/GrTextBlobCache.h
diff --git a/src/gpu/GrTextBlobCache.h b/src/gpu/GrTextBlobCache.h
index 7a2b2a79a17ade040c3c93106b5b22cf8c590015..4bf07f4830f204c10a2f5fdaa04238e8b993aa2d 100644
--- a/src/gpu/GrTextBlobCache.h
+++ b/src/gpu/GrTextBlobCache.h
@@ -21,6 +21,13 @@ public:
 
     // creates an uncached blob
     BitmapTextBlob* createBlob(int glyphCount, int runCount, size_t maxVASize);
+    BitmapTextBlob* createBlob(const SkTextBlob* blob, size_t maxVAStride) {
+        int glyphCount = 0;
+        int runCount = 0;
+        BlobGlyphCount(&glyphCount, &runCount, blob);
+        BitmapTextBlob* cacheBlob = this->createBlob(glyphCount, runCount, maxVAStride);
+        return cacheBlob;
+    }
 
     BitmapTextBlob* createCachedBlob(const SkTextBlob* blob, size_t maxVAStride) {
         int glyphCount = 0;