Revert of Break LCD and Bitmap text dependency on hardcoded atlas values

src/gpu/GrFontAtlasSizes.h

Index: src/gpu/GrFontAtlasSizes.h
diff --git a/src/gpu/GrFontAtlasSizes.h b/src/gpu/GrFontAtlasSizes.h
index 8722ca1a60cf949545757a9c309f192c0bc26fcf..8a3091c6c7448170465f34dd26363ae94d22ba15 100644
--- a/src/gpu/GrFontAtlasSizes.h
+++ b/src/gpu/GrFontAtlasSizes.h
@@ -23,6 +23,15 @@
 #define GR_FONT_ATLAS_NUM_PLOTS_X     (GR_FONT_ATLAS_TEXTURE_WIDTH / GR_FONT_ATLAS_PLOT_WIDTH)
 #define GR_FONT_ATLAS_A8_NUM_PLOTS_X  (GR_FONT_ATLAS_A8_TEXTURE_WIDTH / GR_FONT_ATLAS_A8_PLOT_WIDTH)
 #define GR_FONT_ATLAS_NUM_PLOTS_Y     (GR_FONT_ATLAS_TEXTURE_HEIGHT / GR_FONT_ATLAS_PLOT_HEIGHT)
+
+// one over width and height
+#define GR_FONT_ATLAS_RECIP_WIDTH      "0.00390625"//"0.0009765625"
+#define GR_FONT_ATLAS_A8_RECIP_WIDTH   "0.00390625"//"0.00048828125"
+#define GR_FONT_ATLAS_RECIP_HEIGHT     "0.00390625"//"0.00048828125"
+
+// 1/(3*width)
+// only used for distance fields, which are A8
+#define GR_FONT_ATLAS_LCD_DELTA        "0.001302083"//"0.000162760417"
 #else
 #define GR_FONT_ATLAS_TEXTURE_WIDTH    1024
 #define GR_FONT_ATLAS_A8_TEXTURE_WIDTH 2048
@@ -35,5 +44,14 @@
 #define GR_FONT_ATLAS_NUM_PLOTS_X     (GR_FONT_ATLAS_TEXTURE_WIDTH / GR_FONT_ATLAS_PLOT_WIDTH)
 #define GR_FONT_ATLAS_A8_NUM_PLOTS_X  (GR_FONT_ATLAS_A8_TEXTURE_WIDTH / GR_FONT_ATLAS_A8_PLOT_WIDTH)
 #define GR_FONT_ATLAS_NUM_PLOTS_Y     (GR_FONT_ATLAS_TEXTURE_HEIGHT / GR_FONT_ATLAS_PLOT_HEIGHT)
+
+// one over width and height
+#define GR_FONT_ATLAS_RECIP_WIDTH      "0.0009765625"
+#define GR_FONT_ATLAS_A8_RECIP_WIDTH   "0.00048828125"
+#define GR_FONT_ATLAS_RECIP_HEIGHT     "0.00048828125"
+
+// 1/(3*width)
+// only used for distance fields, which are A8
+#define GR_FONT_ATLAS_LCD_DELTA        "0.000162760417"
 #endif
 #endif