QuotaManager: Return the remaining free disk space as quota.

webkit/quota/quota_manager.h

Index: webkit/quota/quota_manager.h
diff --git a/webkit/quota/quota_manager.h b/webkit/quota/quota_manager.h
index 86e738133fe3985f400d35c603af10f9f3355244..a578b118969e7fbbf1374f0bba3ff32d21da74b9 100644
--- a/webkit/quota/quota_manager.h
+++ b/webkit/quota/quota_manager.h
@@ -207,6 +207,11 @@ class QuotaManager : public QuotaTaskObserver,
  protected:
   virtual ~QuotaManager();
 
+  // Returns the available disk space on the disk containing the current
+  // profile.  Overridden by the TestQuotaManager in order to have a consistent
+  // reported value.
+  virtual int64 GetAvailableDiskSpace() const;
+
  private:
   friend class base::DeleteHelper<QuotaManager>;
   friend class MockQuotaManager;