gdata: Convert FindEntryByResourceIdSync() to asynchronous.

chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc

Index: chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc
diff --git a/chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc b/chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc
index e73ece4fa4930ea2e7908c5f63ea01b710977e75..b6969bea22cbc94971ba27bdbe3f657bbf00705b 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc
+++ b/chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc
@@ -328,10 +328,8 @@ class GDataFileSystemTest : public testing::Test {
   }
 
   GDataEntry* FindEntryByResourceId(const std::string& resource_id) {
-    GDataEntry* entry = NULL;
-    file_system_->FindEntryByResourceIdSync(
-        resource_id, base::Bind(&ReadOnlyFindEntryCallback, &entry));
-    return entry;
+    GDataEntry* entry = file_system_->root_->GetEntryByResourceId(resource_id);
+    return entry ? entry->AsGDataFile() : NULL;
   }
 
   // Gets the entry info for |file_path| and compares the contents against