Fix a bug where the usage for an origin shows up as 0 in Website Settings when the origin uses app cache but not database.
Fix a bug where the usage for an origin shows up as 0 in Website Settings when the origin
uses app cache but not database.

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base