Remove SkColorTable from SkFlattenable hierarchy.

src/core/SkColorTable.cpp

Index: src/core/SkColorTable.cpp
diff --git a/src/core/SkColorTable.cpp b/src/core/SkColorTable.cpp
index c117443954f5d532cef4bf40372d7e37aaae8d08..242ea6ba64a5c37e1440da31c7fff6a51a3ca42c 100644
--- a/src/core/SkColorTable.cpp
+++ b/src/core/SkColorTable.cpp
@@ -100,7 +100,7 @@ SkColorTable::SkColorTable(SkFlattenableReadBuffer& buffer) {
 #endif
 }
 
-void SkColorTable::flatten(SkFlattenableWriteBuffer& buffer) const {
+void SkColorTable::writeToBuffer(SkFlattenableWriteBuffer& buffer) const {
     buffer.writeUInt(fAlphaType);
     buffer.writeColorArray(fColors, fCount);
 }