Implement two-argument check inline cache.

vm/stub_code_x64.cc

Index: vm/stub_code_x64.cc
===================================================================
--- vm/stub_code_x64.cc	(revision 2344)
+++ vm/stub_code_x64.cc	(working copy)
@@ -345,11 +345,16 @@
 }
 
 
-void StubCode::GenerateInlineCacheStub(Assembler* assembler) {
-  __ Unimplemented("InlineCache stub");
+void StubCode::GenerateOneArgCheckInlineCacheStub(Assembler* assembler) {
+  __ Unimplemented("GenerateOneArgCheckInlineCacheStub stub");
 }
 
 
+void StubCode::GenerateTwoArgsCheckInlineCacheStub(Assembler* assembler) {
+  __ Unimplemented("GenerateTwoArgsCheckInlineCacheStub stub");
+}
+
+
 void StubCode::GenerateBreakpointStaticStub(Assembler* assembler) {
   __ Unimplemented("BreakpointStatic stub");
 }