Use unorm shorts for texture coordinates when rendering text.

src/gpu/GrTest.cpp

Index: src/gpu/GrTest.cpp
diff --git a/src/gpu/GrTest.cpp b/src/gpu/GrTest.cpp
index 04122e13198a35119cf1fd4c1a14e21a3352ea96..b4fb27bcc51142b87e6eecd73587f2a40f546df3 100644
--- a/src/gpu/GrTest.cpp
+++ b/src/gpu/GrTest.cpp
@@ -29,16 +29,22 @@ void SetupAlwaysEvictAtlas(GrContext* context) {
     GrBatchAtlasConfig configs[3];
     configs[kA8_GrMaskFormat].fWidth = dim;
     configs[kA8_GrMaskFormat].fHeight = dim;
+    configs[kA8_GrMaskFormat].fLog2Width = SkNextLog2(dim);
+    configs[kA8_GrMaskFormat].fLog2Height = SkNextLog2(dim);
     configs[kA8_GrMaskFormat].fPlotWidth = dim;
     configs[kA8_GrMaskFormat].fPlotHeight = dim;
 
     configs[kA565_GrMaskFormat].fWidth = dim;
     configs[kA565_GrMaskFormat].fHeight = dim;
+    configs[kA565_GrMaskFormat].fLog2Width = SkNextLog2(dim);
+    configs[kA565_GrMaskFormat].fLog2Height = SkNextLog2(dim);
     configs[kA565_GrMaskFormat].fPlotWidth = dim;
     configs[kA565_GrMaskFormat].fPlotHeight = dim;
 
     configs[kARGB_GrMaskFormat].fWidth = dim;
     configs[kARGB_GrMaskFormat].fHeight = dim;
+    configs[kARGB_GrMaskFormat].fLog2Width = SkNextLog2(dim);
+    configs[kARGB_GrMaskFormat].fLog2Height = SkNextLog2(dim);
     configs[kARGB_GrMaskFormat].fPlotWidth = dim;
     configs[kARGB_GrMaskFormat].fPlotHeight = dim;