Not creating ClientUsageTracker for unsupported storage type.

webkit/browser/quota/usage_tracker_unittest.cc

Index: webkit/browser/quota/usage_tracker_unittest.cc
diff --git a/webkit/browser/quota/usage_tracker_unittest.cc b/webkit/browser/quota/usage_tracker_unittest.cc
index 985db2d82580615da48e188d6948186cfdb85a87..98d97ac67f48ae23a6d17fc9de30cf509ec13dc5 100644
--- a/webkit/browser/quota/usage_tracker_unittest.cc
+++ b/webkit/browser/quota/usage_tracker_unittest.cc
@@ -89,6 +89,10 @@ class MockQuotaClient : public QuotaClient {
         FROM_HERE, base::Bind(callback, kQuotaStatusOk));
   }
 
+  virtual bool DoesSupport(quota::StorageType type) const OVERRIDE {
+    return type == quota::kStorageTypeTemporary;
+  }
+
   int64 GetUsage(const GURL& origin) {
     UsageMap::const_iterator found = usage_map_.find(origin);
     if (found == usage_map_.end())