Adding Wayland message loop and gyp build deps

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 079ff1136ae8de2c0e182fc5a11fa52c2169e175..03429d2f0f3bf56b38993fcaab8525d7dbcbd4d1 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -90,8 +90,6 @@
       'toolkit_views%': '<(toolkit_views)',
       'toolkit_uses_pure_views%': '<(toolkit_uses_pure_views)',
       'views_compositor%': '<(views_compositor)',
-      # Whether to build for Wayland display server
-      'use_wayland%': 0,
 
       # We used to provide a variable for changing how libraries were built.
       # This variable remains until we can clean up all the users.
@@ -310,7 +308,8 @@
     'clang_use_chrome_plugins%': '<(clang_use_chrome_plugins)',
     'enable_register_protocol_handler%': '<(enable_register_protocol_handler)',
     'enable_smooth_scrolling%': '<(enable_smooth_scrolling)',
-    'use_wayland%': '<(use_wayland)',
+    # Whether to build for Wayland display server
+    'use_wayland%': 0,
 
     # The release channel that this build targets. This is used to restrict
     # channel-specific build options, like which installer packages to create.