views: add Harmony dialog width support

ui/views/window/dialog_client_view.cc

Index: ui/views/window/dialog_client_view.cc
diff --git a/ui/views/window/dialog_client_view.cc b/ui/views/window/dialog_client_view.cc
index ce9099fb3931760943a25b2c403845c99979f70e..20f11c0115f2344611a2329f141cbd582b9ea005 100644
--- a/ui/views/window/dialog_client_view.cc
+++ b/ui/views/window/dialog_client_view.cc
@@ -174,6 +174,11 @@ gfx::Size DialogClientView::GetPreferredSize() const {
   size.Enlarge(0, contents_size.height());
   size.set_width(std::max(size.width(), contents_size.width()));
 
+  // An explicit width factor overrides automatic sizing.
+  int width_factor = GetDialogDelegate()->GetWidthFactor();
+  if (width_factor != 0)
+    size = gfx::Size(width_factor * 32, size.height());

[Evan Stade, 2016/10/05 19:52:28]

you still need to use GetHeightForWidth

gfx::Size contents_size;
if (width_factor != 0) {
  int width = width_factor * 32;
  contents_size = gfx::Size(width, contents_view()->GetHeightForWidth(width);
} else {
  contents_size = contents_view()->GetPreferredSize();
}

+
   return size;
 }