Fix code around display overscan settings.

ui/gfx/display.cc

Index: ui/gfx/display.cc
diff --git a/ui/gfx/display.cc b/ui/gfx/display.cc
index e647f650603ff777e9a2c46931e5e11c7d3c645a..fb9c13c7f6a3d0a20e1548ff88dae09f8527f60b 100644
--- a/ui/gfx/display.cc
+++ b/ui/gfx/display.cc
@@ -108,6 +108,14 @@ void Display::UpdateWorkAreaFromInsets(const gfx::Insets& insets) {
   work_area_.Inset(insets);
 }
 
+void Display::SetOverscanInsets(const gfx::Insets& insets) {
+  Rect bounds_in_pixel(bounds_in_pixel_);
+  bounds_in_pixel.Inset(overscan_insets_.Scale(device_scale_factor_).Scale(-1));
+  bounds_in_pixel.Inset(insets.Scale(device_scale_factor_));
+  SetScaleAndBounds(device_scale_factor_, bounds_in_pixel);

[oshima, 2012/10/16 22:46:26]

this updates bounds_in_pixel, so it will keep shrinking as you call.

+  overscan_insets_ = insets;
+}
+
 gfx::Size Display::GetSizeInPixel() const {
   return gfx::ToFlooredSize(size().Scale(device_scale_factor_));
 }