Experiment to hide close buttons of inactive tabs when using touch

chrome/browser/ui/tabs/tab_utils.h

Index: chrome/browser/ui/tabs/tab_utils.h
diff --git a/chrome/browser/ui/tabs/tab_utils.h b/chrome/browser/ui/tabs/tab_utils.h
index 4480a41609f149cbc48f01466975e4358718eaa5..5d0630ba4439251709a38347c70f019d4419c36e 100644
--- a/chrome/browser/ui/tabs/tab_utils.h
+++ b/chrome/browser/ui/tabs/tab_utils.h
@@ -46,16 +46,22 @@ namespace chrome {
 //   Pinned tab: Show only the media indicator, or only the favicon
 //               (TAB_MEDIA_STATE_NONE).  Never show the close button.
 bool ShouldTabShowFavicon(int capacity,
+                          int width,
+                          bool touch_used_last,
                           bool is_pinned_tab,
                           bool is_active_tab,
                           bool has_favicon,
                           TabMediaState media_state);
 bool ShouldTabShowMediaIndicator(int capacity,
+                                 int width,
+                                 bool touch_used_last,
                                  bool is_pinned_tab,
                                  bool is_active_tab,
                                  bool has_favicon,
                                  TabMediaState media_state);
 bool ShouldTabShowCloseButton(int capacity,
+                              int width,
+                              bool touch_used_last,
                               bool is_pinned_tab,
                               bool is_active_tab);