[extensions] tool tip for trash icon

BUG=112496
TEST=manual

Review URL: https://chromiumcodereview.appspot.com/9325045

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@120677 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/extensions/extension_list.js

@@ -177,6 +177,7 @@ cr.define('options', function() {
       // 'Remove' button.
       var trashTemplate = $('template-collection').querySelector('.trash');
       var trash = trashTemplate.cloneNode(true);
+      trash.title = templateData.extensionUninstall;
       trash.addEventListener('click', function(e) {
         chrome.send('extensionSettingsUninstall', [extension.id]);
       });

chrome/browser/ui/webui/options/extension_settings_handler.cc

@@ -571,6 +571,11 @@ void ExtensionSettingsHandler::GetLocalizedValues(
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_SHOW_DETAILS));
   localized_strings->SetString("extensionSettingsHideDetails",
       l10n_util::GetStringUTF16(IDS_EXTENSIONS_HIDE_DETAILS));
+
+  // TODO(estade): comb through the above strings to find ones no longer used in
+  // uber extensions.
+  localized_strings->SetString("extensionUninstall",
+    l10n_util::GetStringUTF16(IDS_EXTENSIONS_UNINSTALL));
 }
 
 void ExtensionSettingsHandler::Initialize() {