Remove special "store global proxy" IC, use as slow_stub().

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index fbc426a92dff97b25e24d831f8f9f92432e95ee9..df1f845724e1a5fcb4aff254a791bc68eed06ddc 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1425,16 +1425,6 @@ static void Generate_StoreIC_Megamorphic_Strict(MacroAssembler* masm) {
 }
 
 
-static void Generate_StoreIC_GlobalProxy(MacroAssembler* masm) {
-  StoreIC::GenerateRuntimeSetProperty(masm, kNonStrictMode);
-}
-
-
-static void Generate_StoreIC_GlobalProxy_Strict(MacroAssembler* masm) {
-  StoreIC::GenerateRuntimeSetProperty(masm, kStrictMode);
-}
-
-
 static void Generate_StoreIC_Setter_ForDeopt(MacroAssembler* masm) {
   StoreStubCompiler::GenerateStoreViaSetter(masm, Handle<JSFunction>());
 }