Activate browser window when opening new tab from a packaged app window.

chrome/browser/ui/apps/chrome_app_window_delegate.cc

Index: chrome/browser/ui/apps/chrome_app_window_delegate.cc
diff --git a/chrome/browser/ui/apps/chrome_app_window_delegate.cc b/chrome/browser/ui/apps/chrome_app_window_delegate.cc
index 6bccd2f38f0e4b76421e1879888a7d0b653e3bb3..3bbd9a3ad00e010a89204b043ab63a3b882305bb 100644
--- a/chrome/browser/ui/apps/chrome_app_window_delegate.cc
+++ b/chrome/browser/ui/apps/chrome_app_window_delegate.cc
@@ -48,9 +48,13 @@ content::WebContents* OpenURLFromTabInternal(
   // window.
   chrome::NavigateParams new_tab_params(
       static_cast<Browser*>(NULL), params.url, params.transition);
-  new_tab_params.disposition = params.disposition == NEW_BACKGROUND_TAB
-                                   ? params.disposition
-                                   : NEW_FOREGROUND_TAB;
+  if (params.disposition == NEW_BACKGROUND_TAB) {
+    new_tab_params.disposition = NEW_BACKGROUND_TAB;
+  } else {
+    new_tab_params.disposition = NEW_FOREGROUND_TAB;
+    new_tab_params.window_action = chrome::NavigateParams::SHOW_WINDOW;
+  }
+
   new_tab_params.initiating_profile = Profile::FromBrowserContext(context);
   chrome::Navigate(&new_tab_params);