Allow Chrome to bind an Application request from mojo_runner.

chrome/browser/BUILD.gn

Index: chrome/browser/BUILD.gn
diff --git a/chrome/browser/BUILD.gn b/chrome/browser/BUILD.gn
index 37fbb007fef1d34bf0aa3a3faf535ec1876bc087..6877114df4a7737bd0d89612cac5583f88c0fc84 100644
--- a/chrome/browser/BUILD.gn
+++ b/chrome/browser/BUILD.gn
@@ -566,12 +566,21 @@ source_set("browser") {
   if (use_aura) {
     sources +=
         rebase_path(gypi_values.chrome_browser_aura_sources, ".", "//chrome")
+
+    # These files are only built in a GN build because they bring in
+    # dependencies that don't build with GYP.
+    sources += [
+      "mojo_runner_state.cc",
+      "mojo_runner_state.h",
+    ]
     deps += [
+      "//mojo/runner/child:lib",
       "//ui/aura",
       "//ui/compositor",
       "//ui/keyboard",
       "//ui/keyboard:keyboard_with_content",
     ]
+    defines += [ "MOJO_RUNNER_CLIENT" ]
   }
   if (ui_compositor_image_transport) {
     deps += [ "//ui/gl" ]