Add a confirmation prompt to app uninstallation on the ntp.

chrome/browser/cocoa/extension_install_prompt.mm

Index: chrome/browser/cocoa/extension_install_prompt.mm
diff --git a/chrome/browser/cocoa/extension_install_prompt.mm b/chrome/browser/cocoa/extension_install_prompt.mm
index b73ebc2315a16f6b5df9933a0a2d3ded85f0dfa5..3519319a30d5a3cee2339ba372a5393f92ef4969 100644
--- a/chrome/browser/cocoa/extension_install_prompt.mm
+++ b/chrome/browser/cocoa/extension_install_prompt.mm
@@ -21,7 +21,7 @@ class Profile;
 
 void ExtensionInstallUI::ShowExtensionInstallUIPromptImpl(
     Profile* profile, Delegate* delegate, Extension* extension, SkBitmap* icon,
-    const string16& warning_text, ExtensionInstallUI::PromptType type) {
+    ExtensionInstallUI::PromptType type) {
   NSAlert* alert = [[[NSAlert alloc] init] autorelease];
 
   NSButton* continueButton = [alert addButtonWithTitle:l10n_util::GetNSString(
@@ -37,7 +37,6 @@ void ExtensionInstallUI::ShowExtensionInstallUIPromptImpl(
   [alert setMessageText:l10n_util::GetNSStringF(
        ExtensionInstallUI::kHeadingIds[type],
        UTF8ToUTF16(extension->name()))];
-  [alert setInformativeText:base::SysUTF16ToNSString(warning_text)];
   [alert setAlertStyle:NSWarningAlertStyle];
   [alert setIcon:gfx::SkBitmapToNSImage(*icon)];