Add EXTRA_RASTER_SCALE to quad_view
Add EXTRA_RASTER_SCALE to quad_view

This change adds an addtional raster scale parameter to quad_view.js
for controlling the size of our backing canvases.

BUG=228
R=nduca@chromium.org

Review URL: https://codereview.appspot.com/9979051

git-svn-id: 3a56fcae908c7e16d23cb53443ea4795ac387cf2@605 0e6d7f2b-9903-5b78-7403-59d27f066143

bpsinc-native/src_third_party_trace-viewer,bpsinc-native/src_third_party_trace-viewer,bpsinc-native/src_third_party_trace-viewer,bpsinc-native/src_third_party_trace-viewer