Fix crash when user closes window prior to the "Confirm Install" prompt showing

chrome/browser/extensions/extension_install_prompt_unittest.cc

Index: chrome/browser/extensions/extension_install_prompt_unittest.cc
diff --git a/chrome/browser/extensions/extension_install_prompt_unittest.cc b/chrome/browser/extensions/extension_install_prompt_unittest.cc
index 3150737fd31a562fdb4b3a2cc2e1c2a61983659e..665e2ca5660770eb534cd19b990f019f1c9fc4b9 100644
--- a/chrome/browser/extensions/extension_install_prompt_unittest.cc
+++ b/chrome/browser/extensions/extension_install_prompt_unittest.cc
@@ -24,7 +24,7 @@ void VerifyPromptPermissionsCallback(
     const base::Closure& quit_closure,
     size_t regular_permissions_count,
     size_t withheld_permissions_count,
-    const ExtensionInstallPrompt::ShowParams& params,
+    ExtensionInstallPromptShowParams* params,
     ExtensionInstallPrompt::Delegate* delegate,
     scoped_refptr<ExtensionInstallPrompt::Prompt> install_prompt) {
   ASSERT_TRUE(install_prompt.get());