Some linking fixes for GN build.

BUILD.gn

Index: BUILD.gn
diff --git a/BUILD.gn b/BUILD.gn
index 4d55a65d7089541d25d7b52ce78ab17289890ac5..cf4a565354c1ab2424c6f5f39fedab3d85df1294 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -31,6 +31,7 @@ group("root") {
     "//chrome/utility",
     "//components:all_components",
     "//content",
+    "//content/shell:content_shell",
     "//crypto",
     "//device/bluetooth",
     "//device/nfc",
@@ -129,6 +130,10 @@ group("root") {
     ]
   }
 
+  if (use_x11) {
+    deps += [ "//tools/xdisplaycheck" ]
+  }
+
   if (is_win) {
     deps += [
       "//ui/metro_viewer",
@@ -164,6 +169,7 @@ group("root") {
       "//chrome/service",  # Blocked on content.
       "//chrome/utility",  # Blocked on content.
       "//content",
+      "//content/shell:content_shell",  # Blocked on content.
       "//extensions/common/api",
       "//pdf",  # Not compiled on Android in GYP yet, either.
       "//ppapi:ppapi_c",