Add quick launcher for launching mojo apps from within mash

ui/views/widget/widget.cc

Index: ui/views/widget/widget.cc
diff --git a/ui/views/widget/widget.cc b/ui/views/widget/widget.cc
index aaa93204548a5852016807a0b8235ed343020f68..04c9011b9d92d0689770a0fc8631518cc489c587 100644
--- a/ui/views/widget/widget.cc
+++ b/ui/views/widget/widget.cc
@@ -1449,9 +1449,16 @@ void Widget::SetInitialBounds(const gfx::Rect& bounds) {
     }
   } else {
     if (bounds.IsEmpty()) {
-      // No initial bounds supplied, so size the window to its content and
-      // center over its parent.
-      native_widget_->CenterWindow(non_client_view_->GetPreferredSize());
+      if (bounds.origin().IsOrigin()) {
+        // No initial bounds supplied, so size the window to its content and
+        // center over its parent.
+        native_widget_->CenterWindow(non_client_view_->GetPreferredSize());
+      } else {
+        // Use the preferred size and the supplied origin.
+        gfx::Rect preferred_bounds(bounds);
+        preferred_bounds.set_size(non_client_view_->GetPreferredSize());
+        SetBoundsConstrained(preferred_bounds);
+      }
     } else {
       // Use the supplied initial bounds.
       SetBoundsConstrained(bounds);