Set preallocated TextBatch geometries to 4 rather than 32

src/gpu/GrAtlasTextContext.cpp

Index: src/gpu/GrAtlasTextContext.cpp
diff --git a/src/gpu/GrAtlasTextContext.cpp b/src/gpu/GrAtlasTextContext.cpp
index e20ca4bb7ffd07c84d3cdf689dce05aeab32494e..91527aba64885ac3b31605a0d746a4fb021c76a8 100644
--- a/src/gpu/GrAtlasTextContext.cpp
+++ b/src/gpu/GrAtlasTextContext.cpp
@@ -1773,7 +1773,7 @@ public:
     }
 
     // The minimum number of Geometry we will try to allocate.
-    static const int kMinAllocated = 32;
+    static const int kMinAllocated = 4;
 
     // Total number of Geometry this Batch owns
     int instanceCount() const { return fInstanceCount; }