[StorageMonitor] Remove GetStorageSize.

chrome/browser/storage_monitor/test_storage_monitor.cc

Index: chrome/browser/storage_monitor/test_storage_monitor.cc
diff --git a/chrome/browser/storage_monitor/test_storage_monitor.cc b/chrome/browser/storage_monitor/test_storage_monitor.cc
index 099feb837c717e1e41a14dbe5e6ee0f1d12e35d2..9a9b0e589f81e08ed4823a82fa299ae4c0b0d600 100644
--- a/chrome/browser/storage_monitor/test_storage_monitor.cc
+++ b/chrome/browser/storage_monitor/test_storage_monitor.cc
@@ -31,15 +31,11 @@ bool TestStorageMonitor::GetStorageInfoForPath(
         MediaStorageUtil::FIXED_MASS_STORAGE, path.AsUTF8Unsafe());
     device_info->name = path.BaseName().LossyDisplayName();
     device_info->location = path.value();
+    device_info->total_size_in_bytes = 0;
   }
   return true;
 }
 
-uint64 TestStorageMonitor::GetStorageSize(
-    const base::FilePath::StringType& location) const {
-  return 0;
-}
-
 #if defined(OS_WIN)
 bool TestStorageMonitor::GetMTPStorageInfoFromDeviceId(
     const std::string& storage_device_id,