[StorageMonitor] Remove GetStorageSize.

chrome/browser/storage_monitor/storage_monitor_mac.h

Index: chrome/browser/storage_monitor/storage_monitor_mac.h
diff --git a/chrome/browser/storage_monitor/storage_monitor_mac.h b/chrome/browser/storage_monitor/storage_monitor_mac.h
index 5b2e73fa4b6160a28cd083a6ab9f00fa0b7d4039..1f3c4e66e09c78205cce2322f37e7299a216a0d2 100644
--- a/chrome/browser/storage_monitor/storage_monitor_mac.h
+++ b/chrome/browser/storage_monitor/storage_monitor_mac.h
@@ -42,11 +42,6 @@ class StorageMonitorMac : public StorageMonitor,
       const base::FilePath& path,
       StorageInfo* device_info) const OVERRIDE;
 
-  // Returns the storage size of the device present at |location|. If the
-  // device information is unavailable, returns zero. |location| must be a
-  // top-level mount point.
-  virtual uint64 GetStorageSize(const std::string& location) const OVERRIDE;
-
   virtual void EjectDevice(
       const std::string& device_id,
       base::Callback<void(EjectStatus)> callback) OVERRIDE;