Allow setting of GrBatchFontCache atlas sizes

include/gpu/GrContext.h

Index: include/gpu/GrContext.h
diff --git a/include/gpu/GrContext.h b/include/gpu/GrContext.h
index 50d101cf32f7227885499a06b35015278fdc3270..cb5eb761ed97545de92c79581b66863dcc23184a 100644
--- a/include/gpu/GrContext.h
+++ b/include/gpu/GrContext.h
@@ -18,6 +18,7 @@
 #include "SkPathEffect.h"
 #include "SkTypes.h"
 
+struct GrBatchAtlasConfig;
 class GrBatchFontCache;
 class GrCaps;
 struct GrContextOptions;
@@ -356,6 +357,10 @@ public:
         this is for testing only */
     void setTextBlobCacheLimit_ForTesting(size_t bytes);
 
+    /** Specify the sizes of the GrAtlasTextContext atlases.  The configs pointer below should be
+        to an array of 3 entries */
+    void setTextContextAtlasSizes_ForTesting(const GrBatchAtlasConfig* configs);
+
 private:
     GrGpu*                          fGpu;
     const GrCaps*                   fCaps;