Sample code from Maps API docs: simple map with visual refresh.

"Visual refresh" is just the name for a slightly new visual style
that Google is introducing across their products.
Center map on Perth (when first loaded).
Add KML of Perth metro LGA boundaries.

Downloaded 1270055003_lga_2011_aust_shape.zip from ABS, imported
into QGIS, deleted everything except Perth metro poloygons, simplifed
geometries (tolerance 0.0005), saved in KML format.
Trying to display KML layer, without success.