[ic][stubs] Move more IC-related methods from CSA to AccessorAssembler.

src/ic/keyed-store-generic.cc

Index: src/ic/keyed-store-generic.cc
diff --git a/src/ic/keyed-store-generic.cc b/src/ic/keyed-store-generic.cc
index cf1c49f0c897304788c7134572b5413eb062fa05..27e96ca8edd756179e0b36394d3e7f352c225f6a 100644
--- a/src/ic/keyed-store-generic.cc
+++ b/src/ic/keyed-store-generic.cc
@@ -362,8 +362,8 @@ void KeyedStoreGenericAssembler::StoreElementWithCapacity(
     // Try to store the value as a double.
     {
       Label non_number_value(this);
-      Node* double_value = PrepareValueForWrite(value, Representation::Double(),
-                                                &non_number_value);
+      Node* double_value = TryTaggedToFloat64(value, &non_number_value);
+
       // Make sure we do not store signalling NaNs into double arrays.
       double_value = Float64SilenceNaN(double_value);
       // If we're about to introduce holes, ensure holey elements.