Multi-tab selection for Linux.

chrome/browser/tabs/tab_strip_model_observer.cc

Index: chrome/browser/tabs/tab_strip_model_observer.cc
diff --git a/chrome/browser/tabs/tab_strip_model_observer.cc b/chrome/browser/tabs/tab_strip_model_observer.cc
index cf47a0f8dffad55e3aba993f1a02484da8b9cb9e..b5502ea408cb1c84d462e18d6f66d35cca14f614 100644
--- a/chrome/browser/tabs/tab_strip_model_observer.cc
+++ b/chrome/browser/tabs/tab_strip_model_observer.cc
@@ -27,6 +27,11 @@ void TabStripModelObserver::ActiveTabChanged(TabContentsWrapper* old_contents,
                                              bool user_gesture) {
 }
 
+void TabStripModelObserver::TabSelectionChanged(
+    const std::vector<int>& previously_selected,
+    const std::vector<int>& currently_selected) {
+}
+
 void TabStripModelObserver::TabMoved(TabContentsWrapper* contents,
                                      int from_index,
                                      int to_index) {