Make the strict-mode calling convention for contextual calls the default one.

src/stub-cache.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 911 matching lines @@
                    int argc,
                    Code::Kind kind,
                    ExtraICState extra_state,
                    InlineCacheHolderFlag cache_holder = OWN_MAP);
 
   Handle<Code> CompileCallField(Handle<JSObject> object,
                                 Handle<JSObject> holder,
                                 PropertyIndex index,
                                 Handle<Name> name);
 
-  // Patch the global proxy over the global object if the global object is the
-  // receiver.
-  static void FetchGlobalProxy(MacroAssembler* masm,
-                               Register target,
-                               Register function);
-  void PatchGlobalProxy(Handle<Object> object, Register function);
-  void PatchGlobalProxy(Handle<Object> object, Handle<JSFunction> function);
+  // Patch the implicit receiver over the global object if the global object is
+  // the receiver.
+  void PatchImplicitReceiver(Handle<Object> object);
 
   // Returns the register containing the holder of |name|.
   Register HandlerFrontendHeader(Handle<Object> object,
                                  Handle<JSObject> holder,
                                  Handle<Name> name,
                                  CheckType check,
                                  Label* miss);
   void HandlerFrontendFooter(Label* miss);
 
   void GenerateJumpFunctionIgnoreReceiver(Handle<JSFunction> function);
@@ skipping 132 matching lines @@
   Handle<JSFunction> constant_function_;
   bool is_simple_api_call_;
   Handle<FunctionTemplateInfo> expected_receiver_type_;
   Handle<CallHandlerInfo> api_call_info_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_