base::Bind: Increase the arity to 7.

base/bind.h

Index: base/bind.h
diff --git a/base/bind.h b/base/bind.h
index f023308eb55ec7421fcfac90200c276fc126dfcf..27c6d87a4f76cc0d9c5887c689e54e3207eaf1f2 100644
--- a/base/bind.h
+++ b/base/bind.h
@@ -95,6 +95,17 @@ Bind(Sig f, const P1& p1, const P2& p2, const P3& p3, const P4& p4,
           f, p1, p2, p3, p4, p5, p6));
 }
 
+template <typename Sig, typename P1, typename P2, typename P3, typename P4,
+    typename P5, typename P6, typename P7>
+internal::InvokerStorageHolder<internal::InvokerStorage7<Sig,P1, P2, P3, P4,
+    P5, P6, P7> >
+Bind(Sig f, const P1& p1, const P2& p2, const P3& p3, const P4& p4,
+    const P5& p5, const P6& p6, const P7& p7) {
+  return internal::MakeInvokerStorageHolder(
+      new internal::InvokerStorage7<Sig, P1, P2, P3, P4, P5, P6, P7>(
+          f, p1, p2, p3, p4, p5, p6, p7));
+}
+
 // Specializations to allow binding all the free arguments in a
 // pre-existing base::Callback<>. This does not give full support for
 // currying, but is significantly simpler and addresses the use case
@@ -140,6 +151,15 @@ base::Closure Bind(const base::Callback<Sig>& callback, const P1& p1,
       callback, p1, p2, p3, p4, p5, p6);
 }
 
+template <typename Sig, typename P1, typename P2, typename P3, typename P4,
+    typename P5, typename P6, typename P7>
+base::Closure Bind(const base::Callback<Sig>& callback, const P1& p1,
+    const P2& p2, const P3& p3, const P4& p4, const P5& p5, const P6& p6,
+    const P7& p7) {
+  return base::Bind(&internal::BindMoreFunc7<Sig, P1, P2, P3, P4, P5, P6, P7>,
+      callback, p1, p2, p3, p4, p5, p6, p7);
+}
+
 }  // namespace base
 
 #endif  // BASE_BIND_H_