Remove toolbar from extension windows in streamlined hosted apps mode.

chrome/browser/ui/browser.cc

Index: chrome/browser/ui/browser.cc
diff --git a/chrome/browser/ui/browser.cc b/chrome/browser/ui/browser.cc
index d8ed53fdc045153145375e209a695eedd6afa692..0319aad4a8361c67c508983ce889fb23897409e9 100644
--- a/chrome/browser/ui/browser.cc
+++ b/chrome/browser/ui/browser.cc
@@ -2163,9 +2163,12 @@ bool Browser::SupportsWindowFeatureImpl(WindowFeature feature,
     if (is_type_tabbed())
       features |= FEATURE_TOOLBAR;
 
-    if (!is_app() || CommandLine::ForCurrentProcess()->HasSwitch(
-                         switches::kEnableStreamlinedHostedApps))
+    if (!is_app() || ((app_type() == APP_TYPE_HOST ||
+                       app_name() == DevToolsWindow::kDevToolsApp) &&
+                      CommandLine::ForCurrentProcess()->HasSwitch(
+                          switches::kEnableStreamlinedHostedApps))) {
       features |= FEATURE_LOCATIONBAR;
+    }
   }
   return !!(features & feature);
 }