gdata: Fix GDataFileSystem::GetCacheStateOnUIThread to acquire lock for cache initialization.

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 22297a259394135841c784b2ecf22f240707dfa5..8e3b4a776c1dd586b1a5151dedd149591a023d1d 100644
--- a/chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc
+++ b/chrome/browser/chromeos/gdata/gdata_file_system_unittest.cc
@@ -529,13 +529,9 @@ class GDataFileSystemTest : public testing::Test {
     expected_error_ = expected_error;
     expected_cache_state_ = expected_cache_state;
 
-    {  // Lock to use GetCacheState, but release before flushing tasks because
-       // OnGetCacheState callback will attempt to lock.
-      base::AutoLock lock(file_system_->lock_);
-      file_system_->GetCacheState(resource_id, md5,
-          base::Bind(&GDataFileSystemTest::VerifyGetCacheState,
-                     base::Unretained(this)));
-    }
+    file_system_->GetCacheState(resource_id, md5,
+        base::Bind(&GDataFileSystemTest::VerifyGetCacheState,
+                   base::Unretained(this)));
 
     RunAllPendingForIO();
   }