Unbreak tabs.onRemove extension API in face of fast tab closure

chrome/browser/ui/tabs/tab_strip_model_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 
 #include <map>
 #include <string>
 
 #include "base/files/file_path.h"
@@ skipping 287 matching lines @@
     State s(contents, to_index, MOVE);
     s.src_index = from_index;
     states_.push_back(s);
   }
 
   virtual void TabClosingAt(TabStripModel* tab_strip_model,
                             WebContents* contents,
                             int index) OVERRIDE {
     states_.push_back(State(contents, index, CLOSE));
   }
-  virtual void TabDetachedAt(WebContents* contents, int index) OVERRIDE {
+  virtual void TabDetachedAt(WebContents* contents,
+                             int index,
+                             bool closing_all) OVERRIDE {
     states_.push_back(State(contents, index, DETACH));
   }
   virtual void TabDeactivated(WebContents* contents) OVERRIDE {
     states_.push_back(State(contents, model()->active_index(), DEACTIVATE));
   }
   virtual void TabChangedAt(WebContents* contents,
                             int index,
                             TabChangeType change_type) OVERRIDE {
     states_.push_back(State(contents, index, CHANGE));
   }
@@ skipping 2040 matching lines @@
   strip.ActivateTabAt(1, true);
   ASSERT_EQ(1, observer.GetStateCount());
   State s(contents2, 1, MockTabStripModelObserver::SELECT);
   s.src_contents = contents2;
   s.src_index = 1;
   s.change_reason = TabStripModelObserver::CHANGE_REASON_NONE;
   EXPECT_TRUE(observer.StateEquals(0, s));
   strip.RemoveObserver(&observer);
   strip.CloseAllTabs();
 }