mash: Remove app_driver.

chrome/browser/chromeos/chrome_interface_factory.cc

Index: chrome/browser/chromeos/chrome_interface_factory.cc
diff --git a/chrome/browser/chromeos/chrome_interface_factory.cc b/chrome/browser/chromeos/chrome_interface_factory.cc
index 6d91a99d75c0d32e357c5c9142a20919e612a39f..00c2ff6f1900f8c6b50f0a55791c32b08d99e74e 100644
--- a/chrome/browser/chromeos/chrome_interface_factory.cc
+++ b/chrome/browser/chromeos/chrome_interface_factory.cc
@@ -59,9 +59,6 @@ class ChromeLaunchable : public mash::mojom::Launchable {
       return;
     }
     switch (what) {
-      case mash::mojom::kDocument:
-        CreateNewTab();
-        break;
       case mash::mojom::kWindow:
         CreateNewWindowImpl(false /* is_incognito */);
         break;