Make IC patching resilient to flushing of the original target() ic.

src/code-stubs.cc

 // 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 83 matching lines @@
 
   // Create the code object.
   CodeDesc desc;
   masm.GetCode(&desc);
 
   // Copy the generated code into a heap object.
   Code::Flags flags = Code::ComputeFlags(
       static_cast<Code::Kind>(GetCodeKind()),
       GetICState(),
       GetExtraICState(),
-      GetStubType());
+      GetStubType(),
+      GetStubFlags());
   Handle<Code> new_object = factory->NewCode(
       desc, flags, masm.CodeObject(), NeedsImmovableCode());
   return new_object;
 }
 
 
 Handle<Code> CodeStub::GetCode(Isolate* isolate) {
   Factory* factory = isolate->factory();
   Heap* heap = isolate->heap();
   Code* code;
@@ skipping 520 matching lines @@
   // already active, as the hooks won't stack.
   if (entry_hook != 0 && entry_hook_ != 0)
     return false;
 
   entry_hook_ = entry_hook;
   return true;
 }
 
 
 } }  // namespace v8::internal