Add support for multi-line GlobalError messages to Views.

chrome/browser/extensions/extension_error_ui.cc

Index: chrome/browser/extensions/extension_error_ui.cc
diff --git a/chrome/browser/extensions/extension_error_ui.cc b/chrome/browser/extensions/extension_error_ui.cc
index bb8b624243dab4a5a72c4b9f06002d96fbe5670d..e4f5f37038bd86f3dc456738d91e17a8e67fe5d3 100644
--- a/chrome/browser/extensions/extension_error_ui.cc
+++ b/chrome/browser/extensions/extension_error_ui.cc
@@ -62,13 +62,13 @@ string16 ExtensionErrorUI::GenerateMessage() {
                                 IDS_APP_ALERT_ITEM_BLACKLISTED);
 }
 
-string16 ExtensionErrorUI::GetBubbleViewMessage() {
+std::vector<string16> ExtensionErrorUI::GetBubbleViewMessages() {
   if (message_.empty()) {
     message_ = GenerateMessage();
     if (message_[message_.size()-1] == '\n')
       message_.resize(message_.size()-1);
   }
-  return message_;
+  return std::vector<string16>(1, message_);
 }
 
 string16 ExtensionErrorUI::GetBubbleViewTitle() {