make GlyphCache::InvalidateAllGlyphs do what it says it does
make GlyphCache::InvalidateAllGlyphs do what it says it does

all the things we say don't do in GlyphCache::InvalidateAllGlyphs but would do
if the random debugging getenv was set are always done in the lines after
the one and only call to this.

Change-Id: Icd5719f12ab687568c95d59b1f6413a13cef3e3a

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core