Implementing TabManager extensions API Discard Function.

chrome/browser/extensions/api/tabs/tabs_constants.cc

Index: chrome/browser/extensions/api/tabs/tabs_constants.cc
diff --git a/chrome/browser/extensions/api/tabs/tabs_constants.cc b/chrome/browser/extensions/api/tabs/tabs_constants.cc
index 2903ee9c5adf413f882ec4f5811d70903bc4cd6b..2a7f08bda9d6a9758b9e862181ef25e0da9cc8bc 100644
--- a/chrome/browser/extensions/api/tabs/tabs_constants.cc
+++ b/chrome/browser/extensions/api/tabs/tabs_constants.cc
@@ -85,6 +85,8 @@ const char kPerOriginOnlyInAutomaticError[] = "Can only set scope to "
 const char kWindowNotFoundError[] = "No window with id: *.";
 const char kTabIndexNotFoundError[] = "No tab at index: *.";
 const char kTabNotFoundError[] = "No tab with id: *.";
+const char kCannotDiscardTab[] = "Cannot discard tab with id: *.";
+const char kCannotFindTabToDiscard[] = "Cannot find a tab to discard.";
 const char kTabStripNotEditableError[] =
     "Tabs cannot be edited right now (user may be dragging a tab).";
 const char kNoSelectedTabError[] = "No selected tab";