Omnibox UI: Confine Cocoa suggestion lines to a single-line.

chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm

Index: chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm
diff --git a/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm b/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm
index 2350df54329117ae2baf09d32870eab5e5a1ccc0..d0f2a2e3f71b5377b2cb766735dc39b8635de12f 100644
--- a/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm
+++ b/chrome/browser/ui/cocoa/omnibox/omnibox_popup_cell.mm
@@ -636,6 +636,7 @@ NSAttributedString* CreateClassifiedAttributedString(
       cellFrame, NSOffsetRect(cellFrame, origin.x, origin.y));
   renderRect.size.width =
       std::min(NSWidth(renderRect), static_cast<CGFloat>(maxWidth));
+  renderRect.size.height = std::min(NSWidth(renderRect), kDefaultTextHeight);
   if (!NSIsEmptyRect(renderRect)) {
     [attributedString drawWithRect:FlipIfRTL(renderRect, cellFrame)
                            options:NSStringDrawingUsesLineFragmentOrigin |