Introduce LaunchParams struct for opening chrome apps.

chrome/browser/ui/views/ash/launcher/chrome_launcher_controller_browsertest.cc

Index: chrome/browser/ui/views/ash/launcher/chrome_launcher_controller_browsertest.cc
diff --git a/chrome/browser/ui/views/ash/launcher/chrome_launcher_controller_browsertest.cc b/chrome/browser/ui/views/ash/launcher/chrome_launcher_controller_browsertest.cc
index bd9b2e4137290cd1c984d8feb8b0dadca7aa62e4..31afd6cb7c01693e3019ffb8ccf0ba9769b72a39 100644
--- a/chrome/browser/ui/views/ash/launcher/chrome_launcher_controller_browsertest.cc
+++ b/chrome/browser/ui/views/ash/launcher/chrome_launcher_controller_browsertest.cc
@@ -66,14 +66,8 @@ class LauncherAppBrowserTest : public ExtensionBrowserTest {
         service->GetExtensionById(last_loaded_extension_id_, false);
     EXPECT_TRUE(extension);
 
-    application_launch::OpenApplication(
-        browser()->profile(),
-        extension,
-        // Overriding manifest to open in a panel.
-        container,
-        GURL(),
-        disposition,
-        NULL);
+    application_launch::OpenApplication(application_launch::LaunchParams(
+            browser()->profile(), extension, container, disposition));
     return extension;
   }