Gtk: Make click target of tabs match their appearance.

chrome/chrome_browser.gypi

Index: chrome/chrome_browser.gypi
diff --git a/chrome/chrome_browser.gypi b/chrome/chrome_browser.gypi
index 79d5a3b95c55934b001c0f894c62fdd8209207a1..3b539a2ed84282443fb548bdae0e1ba7a9129e10 100644
--- a/chrome/chrome_browser.gypi
+++ b/chrome/chrome_browser.gypi
@@ -2862,6 +2862,8 @@
         'browser/ui/gtk/gtk_expanded_container.h',
         'browser/ui/gtk/gtk_floating_container.cc',
         'browser/ui/gtk/gtk_floating_container.h',
+        'browser/ui/gtk/gtk_input_event_box.cc',
+        'browser/ui/gtk/gtk_input_event_box.h',
         'browser/ui/gtk/gtk_theme_service.cc',
         'browser/ui/gtk/gtk_theme_service.h',
         'browser/ui/gtk/gtk_tree.cc',
@@ -3039,6 +3041,8 @@
         'browser/ui/tabs/hover_tab_selector.h',
         'browser/ui/tabs/tab_menu_model.cc',
         'browser/ui/tabs/tab_menu_model.h',
+        'browser/ui/tabs/tab_resources.cc',
+        'browser/ui/tabs/tab_resources.h',
         'browser/ui/toolbar/back_forward_menu_model.cc',
         'browser/ui/toolbar/back_forward_menu_model.h',
         'browser/ui/toolbar/encoding_menu_controller.cc',
@@ -4039,6 +4043,7 @@
             'browser/ui/panels/panel_browser_view.cc',
             'browser/ui/panels/panel_browser_view.h',
             'browser/ui/tabs/dock_info.cc',
+            'browser/ui/tabs/tab_resources.cc',
             'browser/ui/views/extensions/extension_view.cc',
             'browser/ui/views/extensions/extension_view.h',
           ],