Adjust atlas sizes to fix Mali400 precision issues

src/gpu/GrDistanceFieldTextContext.cpp

Index: src/gpu/GrDistanceFieldTextContext.cpp
diff --git a/src/gpu/GrDistanceFieldTextContext.cpp b/src/gpu/GrDistanceFieldTextContext.cpp
index a9fe4c9bf6fac7f1ff2213c123533dd70a70b5af..eb172af1b6c941c123d516f3c14b22498a0f64fd 100755
--- a/src/gpu/GrDistanceFieldTextContext.cpp
+++ b/src/gpu/GrDistanceFieldTextContext.cpp
@@ -34,10 +34,9 @@ SK_CONF_DECLARE(bool, c_DumpFontCache, "gpu.dumpFontCache", false,
 
 static const int kSmallDFFontSize = 32;
 static const int kSmallDFFontLimit = 32;
-static const int kMediumDFFontSize = 70;
-static const int kMediumDFFontLimit = 70;
-static const int kLargeDFFontSize = 156;
-SK_COMPILE_ASSERT(GR_SDF_MAX_SIZE >= kLargeDFFontSize, sdf_too_big);
+static const int kMediumDFFontSize = 72;
+static const int kMediumDFFontLimit = 72;
+static const int kLargeDFFontSize = 162;
 
 static const int kVerticesPerGlyph = 4;
 static const int kIndicesPerGlyph = 6;