Attempt to improve lifetime management of SkGlyphCache in Ganesh atlas text code.

src/gpu/text/GrAtlasTextBlob.h

Index: src/gpu/text/GrAtlasTextBlob.h
diff --git a/src/gpu/text/GrAtlasTextBlob.h b/src/gpu/text/GrAtlasTextBlob.h
index 788eaba77bfb4ffffde2e84ddd994a5475acd4bf..d9083b2f568ed3f48112e64ab140d31057ad617d 100644
--- a/src/gpu/text/GrAtlasTextBlob.h
+++ b/src/gpu/text/GrAtlasTextBlob.h
@@ -256,12 +256,15 @@ public:
         this->setupViewMatrix(viewMatrix, x, y);
     }
 
+    /**
+     * Consecutive calls to regenInBatch often use the same SkGlyphCache. If the same instance of
+     * SkAutoGlyphCache is passed to multiple calls of regenInBatch then it can save the cost of
+     * multiple detach/attach operations of SkGlyphCache.
+     */
     void regenInBatch(GrDrawBatch::Target* target, GrBatchFontCache* fontCache,
-                      GrBlobRegenHelper *helper, int run, int subRun, SkGlyphCache** cache,
-                      SkTypeface** typeface, const SkDescriptor** desc, size_t vertexStride,
-                      const SkMatrix& viewMatrix, SkScalar x, SkScalar y,
-                      GrColor color,
-                      void** vertices, size_t* byteCount, int* glyphCount);
+                      GrBlobRegenHelper *helper, int run, int subRun, SkAutoGlyphCache*,
+                      size_t vertexStride, const SkMatrix& viewMatrix, SkScalar x, SkScalar y,
+                      GrColor color, void** vertices, size_t* byteCount, int* glyphCount);
 
     const Key& key() const { return fKey; }
 
@@ -489,9 +492,9 @@ private:
     void regenInBatch(GrDrawBatch::Target* target,
                       GrBatchFontCache* fontCache,
                       GrBlobRegenHelper* helper,
-                      Run* run, Run::SubRunInfo* info, SkGlyphCache** cache,
-                      SkTypeface** typeface, const SkDescriptor** desc,
-                      int glyphCount, size_t vertexStride,
+                      Run* run, Run::SubRunInfo* info,
+                      SkAutoGlyphCache*, int glyphCount,
+                      size_t vertexStride,
                       GrColor color, SkScalar transX,
                       SkScalar transY) const;