Allow std::unordered_*.

cc/quads/render_pass.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_QUADS_RENDER_PASS_H_
 #define CC_QUADS_RENDER_PASS_H_
 
 #include <stddef.h>
 
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/containers/hash_tables.h"
+#include "base/hash.h"
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/list_container.h"
 #include "cc/quads/render_pass_id.h"
 #include "cc/surfaces/surface_id.h"
 #include "skia/ext/refptr.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/transform.h"
 
@@ skipping 107 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(RenderPass);
 };
 
 }  // namespace cc
 
 namespace BASE_HASH_NAMESPACE {
 template <>
 struct hash<cc::RenderPassId> {
   size_t operator()(cc::RenderPassId key) const {
-    return base::HashPair(key.layer_id, static_cast<int>(key.index));
+    return base::HashInts(key.layer_id, static_cast<int>(key.index));
   }
 };
 }  // namespace BASE_HASH_NAMESPACE
 
 namespace cc {
 typedef std::vector<scoped_ptr<RenderPass>> RenderPassList;
 typedef base::hash_map<RenderPassId, RenderPass*> RenderPassIdHashMap;
 }  // namespace cc
 
 #endif  // CC_QUADS_RENDER_PASS_H_