add flags from skia_for_chromium_defines.gypi

skia/config/SkUserConfig.h

Index: skia/config/SkUserConfig.h
diff --git a/skia/config/SkUserConfig.h b/skia/config/SkUserConfig.h
index 04ca677956917dd4aa7cb741ed3cf63d06d457f1..46ba56a0c9d3e0680f4dc55fdf0e804186e1dd51 100644
--- a/skia/config/SkUserConfig.h
+++ b/skia/config/SkUserConfig.h
@@ -265,6 +265,22 @@ SK_API void SkDebugf_FileLine(const char* file, int line, bool fatal,
 #   define SK_IGNORE_GPU_DITHER
 #endif
 
+#ifndef SK_SUPPORT_LEGACY_TEXTRENDERMODE
+#   define SK_SUPPORT_LEGACY_TEXTRENDERMODE
+#endif
+
+#ifndef SK_IGNORE_GPU_LAYER_HOISTING
+#   define SK_IGNORE_GPU_LAYER_HOISTING
+#endif
+
+#ifndef SK_SUPPORT_LEGACY_NewRasterPMColor
+#   define SK_SUPPORT_LEGACY_NewRasterPMColor
+#endif
+
+#ifndef SK_LEGACY_ENCODE_BITMAP
+#   define SK_LEGACY_ENCODE_BITMAP
+#endif
+
 // If this goes well, we can have Skia respect DYNAMIC_ANNOTATIONS_ENABLED directly.
 #if DYNAMIC_ANNOTATIONS_ENABLED
 #    define SK_DYNAMIC_ANNOTATIONS_ENABLED 1