Fixes bug where chrome hangs in Mac when clicking on Permission link on Extensions.

chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller_browsertest.mm

Index: chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller_browsertest.mm
diff --git a/chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller_browsertest.mm b/chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller_browsertest.mm
index c23412537e8057915850db5315596d8066535b79..402dcfbc8dc4d8469c559f9fca619aeb10a39ff4 100644
--- a/chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller_browsertest.mm
+++ b/chrome/browser/ui/cocoa/extensions/extension_install_dialog_controller_browsertest.mm
@@ -47,3 +47,27 @@ IN_PROC_BROWSER_TEST_F(ExtensionInstallDialogControllerTest, BasicTest) {
   // Wait for the window to finish closing.
   EXPECT_FALSE([window isVisible]);
 }
+
+IN_PROC_BROWSER_TEST_F(ExtensionInstallDialogControllerTest, Permissions) {
+  content::WebContents* tab = browser()->tab_strip_model()->GetWebContentsAt(0);
+  ExtensionInstallPrompt::ShowParams show_params(tab);
+
+  chrome::MockExtensionInstallPromptDelegate delegate;
+  ExtensionInstallPrompt::Prompt prompt =
+      chrome::BuildExtensionPostInstallPermissionsPrompt(extension_);
+
+  ExtensionInstallDialogController* controller =
+      new ExtensionInstallDialogController(show_params,
+                                           &delegate,
+                                           prompt);
+
+  scoped_nsobject<NSWindow> window(
+      [[[controller->view_controller() view] window] retain]);
+  EXPECT_TRUE([window isVisible]);
+
+  // Press cancel to close the window
+  [[controller->view_controller() cancelButton] performClick:nil];
+
+  // Wait for the window to finish closing.
+  EXPECT_FALSE([window isVisible]);
+}