Fix reflow for mobile sites.
Fix reflow for mobile sites.

1. use correct mDefaultScale instead of 1.0f.
2. ignore mMinZoomScaleFixed in case of using wide viewport since
sometimes mobile site will impose a min scale while the web content
will make it bigger than overview scale.

issue: 4257815

Change-Id: Ib4ca9b4dab8585827081a32432076eeeaedecd38

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