[builtins] Turn StoreIC_Miss and StoreIC_Slow builtins to TurboFan code stubs.

src/ic/mips/handler-compiler-mips.cc

Index: src/ic/mips/handler-compiler-mips.cc
diff --git a/src/ic/mips/handler-compiler-mips.cc b/src/ic/mips/handler-compiler-mips.cc
index 93fb505954e36e0905ed2caaeecb6b571664789d..1ed8fece8ab3ab36abe2fdeae687012edb6ba99b 100644
--- a/src/ic/mips/handler-compiler-mips.cc
+++ b/src/ic/mips/handler-compiler-mips.cc
@@ -326,15 +326,6 @@ static void StoreIC_PushArgs(MacroAssembler* masm) {
 }
 
 
-void NamedStoreHandlerCompiler::GenerateSlow(MacroAssembler* masm) {
-  StoreIC_PushArgs(masm);
-
-  // The slow case calls into the runtime to complete the store without causing
-  // an IC miss that would otherwise cause a transition to the generic stub.
-  __ TailCallRuntime(Runtime::kStoreIC_Slow);
-}
-
-
 void ElementHandlerCompiler::GenerateStoreSlow(MacroAssembler* masm) {
   StoreIC_PushArgs(masm);