Accumulate FileSystemUsageCache updates.

webkit/fileapi/obfuscated_file_util_unittest.cc

Index: webkit/fileapi/obfuscated_file_util_unittest.cc
diff --git a/webkit/fileapi/obfuscated_file_util_unittest.cc b/webkit/fileapi/obfuscated_file_util_unittest.cc
index 349ee1c881a0f809c64d682b39ec3f69732247a9..c0d3e4eb4ef48ce7d886691c3f284d9f724ffe74 100644
--- a/webkit/fileapi/obfuscated_file_util_unittest.cc
+++ b/webkit/fileapi/obfuscated_file_util_unittest.cc
@@ -229,6 +229,7 @@ class ObfuscatedFileUtilTest : public testing::Test {
   }
 
   int64 SizeInUsageFile() {
+    MessageLoop::current()->RunUntilIdle();
     return FileSystemUsageCache::GetUsage(test_helper_.GetUsageCachePath());
   }
 
@@ -353,6 +354,7 @@ class ObfuscatedFileUtilTest : public testing::Test {
           expected_usage_(expected_usage) {}
 
     ~UsageVerifyHelper() {
+      MessageLoop::current()->RunUntilIdle();
       Check();
     }