Fix issue with site-specific display density getting stuck.
Fix issue with site-specific display density getting stuck.

This issue was found while investigating b/5328288.

After navigating to a page that specifies target-densitydpi in the
viewport meta tag, this density value wasn't reset to the default value
for a page that didn't.

Change-Id: I1a66dab769026367224ecf4cc28bc033ee97e475

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