Adds the option of aligning the launcher to the left or right. There

ui/gfx/monitor.cc

Index: ui/gfx/monitor.cc
diff --git a/ui/gfx/monitor.cc b/ui/gfx/monitor.cc
index 5783a92babe08ef15f8a3d52832d613c3bb1f082..32f545e4808f421af8dcb694ca491b8b847c7280 100644
--- a/ui/gfx/monitor.cc
+++ b/ui/gfx/monitor.cc
@@ -58,6 +58,13 @@ Monitor::Monitor(int id, const gfx::Rect& bounds)
 Monitor::~Monitor() {
 }
 
+Insets Monitor::GetWorkAreaInsets() const {
+  return gfx::Insets(work_area_.y() - bounds_.y(),
+                     work_area_.x() - bounds_.x(),
+                     bounds_.bottom() - work_area_.bottom(),
+                     bounds_.right() - work_area_.right());
+}
+
 void Monitor::SetScaleAndBounds(
     float device_scale_factor,
     const gfx::Rect& bounds_in_pixel) {