use colortype instead of config

src/core/SkScalerContext.cpp

Index: src/core/SkScalerContext.cpp
diff --git a/src/core/SkScalerContext.cpp b/src/core/SkScalerContext.cpp
index 1c148776674d6f39311ce8d52d9b478079e11eeb..d0d24eebe8c0f077404bc8b96630b7ddbd06ef1c 100644
--- a/src/core/SkScalerContext.cpp
+++ b/src/core/SkScalerContext.cpp
@@ -428,7 +428,7 @@ static void pack4xHToLCD16(const SkBitmap& src, const SkMask& dst,
                            const SkMaskGamma::PreBlend& maskPreBlend) {
 #define SAMPLES_PER_PIXEL 4
 #define LCD_PER_PIXEL 3
-    SkASSERT(SkBitmap::kA8_Config == src.config());
+    SkASSERT(kAlpha_8_SkColorType == src.colorType());
     SkASSERT(SkMask::kLCD16_Format == dst.fFormat);
 
     const int sample_width = src.width();
@@ -502,7 +502,7 @@ static void pack4xHToLCD16(const SkBitmap& src, const SkMask& dst,
 template<bool APPLY_PREBLEND>
 static void pack4xHToLCD32(const SkBitmap& src, const SkMask& dst,
                            const SkMaskGamma::PreBlend& maskPreBlend) {
-    SkASSERT(SkBitmap::kA8_Config == src.config());
+    SkASSERT(kAlpha_8_SkColorType == src.colorType());
     SkASSERT(SkMask::kLCD32_Format == dst.fFormat);
 
     const int width = dst.fBounds.width();