Implement implicit instance checks for API accessors.

src/ia32/stub-cache-ia32.cc

Index: src/ia32/stub-cache-ia32.cc
diff --git a/src/ia32/stub-cache-ia32.cc b/src/ia32/stub-cache-ia32.cc
index 4964c02f6a4f81c60bd9036f71a38adbed957125..11e96fc8ae269c38adf66f4409abae2fee16e53f 100644
--- a/src/ia32/stub-cache-ia32.cc
+++ b/src/ia32/stub-cache-ia32.cc
@@ -1124,8 +1124,9 @@ void StubCompiler::GenerateLoadInterceptor(Handle<JSObject> object,
       compile_followup_inline = true;
     } else if (lookup->type() == CALLBACKS &&
                lookup->GetCallbackObject()->IsAccessorInfo()) {
-      compile_followup_inline =
-          AccessorInfo::cast(lookup->GetCallbackObject())->getter() != NULL;
+      AccessorInfo* callback = AccessorInfo::cast(lookup->GetCallbackObject());
+      compile_followup_inline = callback->getter() != NULL &&
+          callback->IsCompatibleReceiver(*object);
     }
   }