gdata: Use member functions of CacheEntry where it can

chrome/browser/chromeos/gdata/gdata_cache.cc

Index: chrome/browser/chromeos/gdata/gdata_cache.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_cache.cc b/chrome/browser/chromeos/gdata/gdata_cache.cc
index bfa15ae8aae65ccde57cf81953a15ab337d808b6..3d13b7c2012321bb187fda5517595380240a195c 100644
--- a/chrome/browser/chromeos/gdata/gdata_cache.cc
+++ b/chrome/browser/chromeos/gdata/gdata_cache.cc
@@ -337,13 +337,13 @@ void RunGetCacheEntryCallback(
 
 std::string GDataCache::CacheEntry::ToString() const {
   std::vector<std::string> cache_states;
-  if (GDataCache::IsCachePresent(cache_state))
+  if (IsPresent())
     cache_states.push_back("present");
-  if (GDataCache::IsCachePinned(cache_state))
+  if (IsPinned())
     cache_states.push_back("pinned");
-  if (GDataCache::IsCacheDirty(cache_state))
+  if (IsDirty())
     cache_states.push_back("dirty");
-  if (GDataCache::IsCachePersistent(cache_state))
+  if (IsPersistent())
     cache_states.push_back("persistent");
 
   return base::StringPrintf("md5=%s, cache_state=%s",