Switch cc to std::unordered_*.

cc/quads/render_pass.h

Index: cc/quads/render_pass.h
diff --git a/cc/quads/render_pass.h b/cc/quads/render_pass.h
index 9ba727e6df4d3ecbcd70f99594219c70db61847b..9925afb5e027d648507eb50780d0ebfa844c3b6d 100644
--- a/cc/quads/render_pass.h
+++ b/cc/quads/render_pass.h
@@ -7,11 +7,11 @@
 
 #include <stddef.h>
 
+#include <unordered_map>
 #include <utility>
 #include <vector>
 
 #include "base/callback.h"
-#include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/list_container.h"
@@ -135,18 +135,10 @@ class CC_EXPORT 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));
-  }
-};
-}  // namespace BASE_HASH_NAMESPACE
-
 namespace cc {
 typedef std::vector<scoped_ptr<RenderPass>> RenderPassList;
-typedef base::hash_map<RenderPassId, RenderPass*> RenderPassIdHashMap;
+typedef std::unordered_map<RenderPassId, RenderPass*, RenderPassIdHash>
+    RenderPassIdHashMap;
 }  // namespace cc
 
 #endif  // CC_QUADS_RENDER_PASS_H_