Use the site engagement eviction policy for temporary storage eviction.

storage/browser/quota/quota_manager.h

Index: storage/browser/quota/quota_manager.h
diff --git a/storage/browser/quota/quota_manager.h b/storage/browser/quota/quota_manager.h
index 506aa0ad05f806d9bd3ec58f1734ca2829a97229..a03d5279187351b289235238573ec505dae0c501 100644
--- a/storage/browser/quota/quota_manager.h
+++ b/storage/browser/quota/quota_manager.h
@@ -139,7 +139,12 @@ class STORAGE_EXPORT QuotaManager
       const base::FilePath& profile_path,
       const scoped_refptr<base::SingleThreadTaskRunner>& io_thread,
       const scoped_refptr<base::SequencedTaskRunner>& db_thread,
-      const scoped_refptr<SpecialStoragePolicy>& special_storage_policy);
+      const scoped_refptr<SpecialStoragePolicy>& special_storage_policy,
+      QuotaEvictionPolicy* temporary_storage_eviction_policy);
+
+  void set_temporary_storage_eviction_policy(QuotaEvictionPolicy* policy) {
+    temporary_storage_eviction_policy_ = policy;
+  }
 
   // Returns a proxy object that can be used on any thread.
   QuotaManagerProxy* proxy() { return proxy_.get(); }
@@ -288,6 +293,7 @@ class STORAGE_EXPORT QuotaManager
   friend struct QuotaManagerDeleter;
 
   class GetUsageInfoTask;
+  class GetTemporaryEvictionOriginTask;
 
   class OriginDataDeleter;
   class HostDataDeleter;
@@ -433,6 +439,7 @@ class STORAGE_EXPORT QuotaManager
   // TODO(michaeln): Need a way to clear the cache, drop and
   // reinstantiate the trackers when they're not handling requests.
 
+  QuotaEvictionPolicy* temporary_storage_eviction_policy_;
   scoped_ptr<QuotaTemporaryStorageEvictor> temporary_storage_evictor_;
   EvictionContext eviction_context_;