Change width of rows in material design omnibox dropdown

chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc

Index: chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc
diff --git a/chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc b/chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc
index d716b57767e858e0bc7b5d107f630642efcd3ba8..934542e5176ea9038509cbdcb6a1de78c39fa38b 100644
--- a/chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc
+++ b/chrome/browser/ui/views/omnibox/omnibox_popup_contents_view.cc
@@ -116,12 +116,17 @@ void OmniboxPopupContentsView::LayoutChildren() {
       ThemeProperties::PROPERTY_OMNIBOX_DROPDOWN_MIN_TEXT_VERTICAL_PADDING);
 
   gfx::Rect contents_rect = GetContentsBounds();
-
   contents_rect.Inset(
-      left_margin_,
-      views::NonClientFrameView::kClientEdgeThickness + min_vertical_padding,
-      right_margin_,
-      min_vertical_padding);
+      0, views::NonClientFrameView::kClientEdgeThickness + min_vertical_padding,
+      0, min_vertical_padding);
+
+  // In the non-material dropdown, the colored/clickable regions within the
+  // dropdown are only as wide as the location bar. In the material version,
+  // these are full width, and OmniboxResultView instead insets the icons/text
+  // inside to be aligned with the location bar.
+  if (!ui::MaterialDesignController::IsModeMaterial())
+    contents_rect.Inset(left_margin_, 0, right_margin_, 0);
+
   int top = contents_rect.y();
   for (size_t i = 0; i < AutocompleteResult::kMaxMatches; ++i) {
     View* v = child_at(i);