Adding Wayland support for ui/gfx

ui/ui.gyp

Index: ui/ui.gyp
diff --git a/ui/ui.gyp b/ui/ui.gyp
index f8b43c5bfac06f9dba3cdbfce4dbe07e46386f32..3273e520cd0c3c37e6cf8852ba48e83e0e040df8 100644
--- a/ui/ui.gyp
+++ b/ui/ui.gyp
@@ -308,6 +308,33 @@
             }],
           ],
         }],
+        ['use_wayland == 1', {
+          'sources/': [
+            ['exclude', '_(gtk|x)\\.cc$'],
+            ['exclude', '/(gtk|x11)_[^/]*\\.cc$'],
+            ['include', 'base/dragdrop/os_exchange_data_provider_gtk.cc'],
+            ['include', 'base/dragdrop/os_exchange_data_provider_gtk.h'],
+            ['include', 'base/dragdrop/gtk_dnd_util.cc'],
+            ['include', 'base/dragdrop/gtk_dnd_util.h'],
+            ['include', 'base/keycodes/keyboard_code_conversion_x.cc'],
+            ['include', 'base/keycodes/keyboard_code_conversion_x.h'],
+            ['include', 'base/view_prop.cc'],
+            ['include', 'base/view_prop.h'],
+            ['include', 'base/x/x11_util.cc'],
+            ['include', 'base/x/x11_util.h'],
+            ['include', 'base/x/x11_util_internal.h'],
+            ['include', 'gfx/gtk_util.cc'],
+            ['include', 'gfx/gtk_util.h'],
+            ['include', 'gfx/path_gtk.cc'],
+            ['include', 'gfx/platform_font_gtk.cc'],
+            ['include', 'gfx/platform_font_gtk.h'],
+          ],
+        }, {
+          'sources/': [
+            ['exclude', '_(wayland)\\.cc$'],
+            ['exclude', '/(wayland)_[^/]*\\.cc$'],
+          ], 
+        }],
         ['OS=="win"', {
           'sources': [
             'gfx/canvas_direct2d.cc',